Faculty Profiles - SAKURAI KOUICHI

Information

写真a

SAKURAI KOUICHI

Organization

Faculty of Information Science and Electrical Engineering Department of Informatics Professor
Cyber Security Center （Joint Appointment）
School of Engineering Department of Electrical Engineering and Computer Science（Joint Appointment）
Graduate School of Information Science and Electrical Engineering Department of Information Science and Technology（Joint Appointment）
Joint Graduate School of Mathematics for Innovation （Joint Appointment）

Profile

Kouichi Sakurai received the B.S. degree in mathematics from the Faculty of Science, Kyushu University in 1986. He received the M.S. degree in applied science in 1988, and the Doctorate in engineering in 1993 from the Faculty of Engineering, Kyushu University. He was engaged in research and development on cryptography and information security at the Computer and Information Systems Laboratory at Mitsubishi Electric Corporation from 1988 to 1994. From 1994, he worked for the Dept. of Computer Science of Kyushu University in the capacity of associate professor, and became a full professor there in 2002. He is concurrently working also with the Institute of Systems & Information Technologies and Nanotechnologies, as the chief of Information Security laboratory, for promoting research co-oporations among the industry, university and government under the theme "Enhancing IT-security in social systems". He has been successful in generating such co-operation between Japan, China and Korea for security technologies as the leader of a Cooperative International Research Project supported by the National Institute of Information and Communications Technology (NICT) during 2005-2006. Moreover, in March 2006, he established research co-oporations under a Memorandum of Understanding in the field of information security with Professor Bimal Kumar Roy, the first time Japan has partnered with The Cryptology Research Society of India (CRSI). Professor Sakurai has published more than 450 academic papers around cryptography and information security (See:https://dblp.org/pid/16/3865.html)

Homepage

http://itslab.inf.kyushu-u.ac.jp

External link

Research Areas

Informatics / Information security

Degree

PhD (Doctor of Engineering)

Research History

三菱電機・情報電子研究所（1988Apr~1993Feb）

三菱電機・情報電子研究所（1988Apr~1993Feb）

Research Interests・Research Keywords

Research theme：Quantum Cryptography

Keyword：Quantum Cryptography

Research period： 2024
Research theme：Cryptography

Keyword：Cryptography

Research period： 2024
Research theme：Trust

Keyword：Trust

Research period： 2024
Research theme：CryptoCurrecny

Keyword：CryptoCurrecny

Research period： 2024
Research theme：AI Crypto theory

Keyword：AI Crypto theory

Research period： 2024
Research theme：AI

Keyword：AI

Research period： 2024
Research theme：Privacy

Keyword：Privacy

Research period： 2024
Research theme：Blockchain

Keyword：Blockchain

Research period： 2024
Research theme：Cyber Security

Keyword：Cyber Security

Research period： 2024
Research theme：NFT(Non-Fungible Token)

Keyword：NFT(Non-Fungible Token)

Research period： 2022.4 - 2024.5
Research theme：Ai Cryptography

Keyword：deep learning, Cryptography

Research period： 2021.4 - 2022.7
Research theme：Blockchain for Social Infrastructure

Keyword：Smart contact, e-voting

Research period： 2020.1 - 2020.6
Research theme：Crypto Currency and Blockchain

Keyword：bitcoin

Research period： 2018.4 - 2021.8
Research theme：AI-security

Keyword：Artificial Intelligence, Adversarial Machine Learning

Research period： 2017.4 - 2018.6
Research theme：Cyber Security

Keyword：Network, AI

Research period： 2015.4 - 2016.5
Research theme：Network Security Economics

Keyword：Game Theory

Research period： 2010.8 - 2011.8
Research theme：Design and Analysis of Cryptographic Algorithms

Keyword：common-key cryptosyetms, security evaluation

Research period： 2005.4 - 2012.10
Research theme：Cryptography and Informatin Security

Keyword：Information Security, Cryptography, Internet Protocol, Mobile Technology, Web Application, Operating System

Research period： 1994.3

Awards

SCAT 会長賞

2019.1 （一財）テレコム先端技術研究支援センター「超高速暗号 KCipher-2 の研究開発と実用化」

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SCAT表彰は、ICT(情報通信技術)の研究開発により国民生活の安全安心に寄与するなど多大な貢献のあった研究者に授与する趣旨で、
2019年度から公募・他薦によって実施している。
本年度の表彰は、会長大賞 2件、会長賞 2件、優秀賞 1件の合計5件であった。
下名の受賞は、KDDI総合研究所3名との共同研究開発・国際標準化に対して贈られた。

清本晋作1、田中俊昭1、仲野有登1、櫻井幸一2 (1: KDDI 総合研究所、2: 九州大学)
平成27年度電子情報通信学会業績賞

2016.5 電子情報通信学会超高速暗号 KCipher-2 の開発と標準化田中俊昭（KDDI研）清本晋作（KDDI研）櫻井幸一（九州大学）
貢献賞（国際会議）

2015.9 電子情報通信学会・基礎境界ソサイエティ国際会議IWSEC2015(The 9th International Workshop on Security)の運営に関する貢献
DICOMO2015優秀論文賞

2015.9 情報処理学会・マルチメディア、分散、協調とモバイルシンポジウム・プログラム委員会「ネットワーク攻撃に対する端末非依存型検知方式のOpenFlowコントローラ上への実装と評価」宮﨑亮輔†，川本淳平†，松本晋一*，櫻井幸一† (†九州大学，*九州先端科学技術研究所)に対する論文賞

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ネットワーク仮想化技術であるSoftware-Dened Network (SDN) において，マルチエー
ジェントを用いてサイバー攻撃を検知する手法を提案する．我々がこれまでに提案してきた手法では，SDN
内に単一のエージェントを配置し攻撃検知を行っていた．しかし，単一エージェントでは検知結果にノイ
ズが含まれることが問題であった．本稿では，監視するネットワークデータに関する多様性，異常と判断
する閾値に関する多様性並びにエージェントの寿命に関する多様性を導入し，単一エージェントによる過
度な検出を抑え複数の異常傾向を考慮した検知を提案する．また，比較評価実験により，多様性の導入に
よって検知結果ノイズが削減できたことを確認した．
The Second International Symposium on Computing and Networking – Across Practical Development and Theoretical Research- (CANDAR’14)

2014.12 “Parallelization of QUAD Stream Cipher using Linear Recurring Sequences on Graphics Processing Units” Satoshi Tanaka, Chen-Mou Cheng, Takanori Yasuda and Kouichi Sakurai

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“Parallelization of QUAD Stream Cipher using Linear Recurring Sequences on Graphics Processing Units”
第26回独創性を拓く先端技術大賞　経済産業大臣賞

2012.7 日本工業新聞社主催　審査委員会は文部科学省、経済産業省、フジサンケイビジネスアイ、フジサンケイグループ関係者から構成 2005年からKDDI研究所と共同で設計開発した高速ストリーム暗号アルゴリズム「KCipher-2」の標準化が、2011年に成功しISO国際標準規格として採用された。「KCipher-2」は、KDDI研と下名が共同で設計し、KDDI研によって商用化された高速ストリーム暗号アルゴリズムである。「KCipher-2」は、携帯電話機等の小型で処理能力が限られた機器や大容量データの高速処理向けに設計し、暗号化と復号に同じ鍵を使用する共通鍵暗号方式である。共通鍵暗号方式で米国標準のAES と比べて、最大10倍の速さで暗号化と復元を実現している。 KDDIとKDDI研は現在、「KCipher-2」の高速・軽量という特徴を生かし、マルチメディアコンテンツ配信やデータセンターなど大容量のデータを扱う分野や、携帯電話やICカードなどリソースが限られた中で高速な処理を求められる分野に積極的に展開している。この業績により 2012年に第26回独創性を拓く先端技術大賞経済大臣賞をKDDI研究所ともに櫻井は受賞した。
JWIS論文賞

2010.9 IEICE ICSS研究会 2010年　9月　The 5th Joint Workshop on Information Security (JWIS 2010) Examination about the application to the color image of the digital watermark based on Benford’s Law （論文賞受賞） Jointwork with K.Noda and Y.Ueshige
第4回コンピュータセキュリティシンポジウム優秀論文賞

2001.11 情報処理学会
坂井特別記念賞授賞

2000.5 情報処理学会
情報処理学会論文賞授賞

2000.5 情報処理学会

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Papers

A statistical verification method of random permutations for hiding countermeasure against side-channel attacks, Reviewed International coauthorship

Jong-Yeon Park, Jang-Won Ju, Wonil Lee, Bo Gyeong Kang, Yasuyuki Kachi, Kouichi Sakurai

Journal of Information Security and Applications, 84 2024.8 （ ISSN:2214-2126 ）

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Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier

Hiding countermeasure is among the best-known secure implementation techniques designed to counteract side-channel attacks. It uses a permutation algorithm to shuffle data. In today’s Post-Quantum Cryptography (PQC), hiding countermeasure has earned the limelight for its “shufflability” in lattice-based, and code-based, cryptographic algorithms. In this narrative, most importantly, as a rule, fast generation of permutations is paramount to both efficacy and security of an algorithm. The Fisher–Yates (FY) shuffling method has long been a popular choice for this purpose: the FY method generates randomly shuffled (finite) indices. However, despite its theoretical verity, with the FY method we anticipate the following risks of misuse, which can lead to biased shuffling sequences: (i) incorrect implementation, (ii) poor random source, and (iii) the chosen random number being too small. In this paper, we introduce a new statistical test called “approximate permutation criterion” (“APC”). We use it to examine some known cases of misused FY shuffling (i–iii). APC takes into consideration the fact that the super-exponential rate of growth of the factorial function N!, which represents the number of permutations of N indices, defies any meaningful form of statistical tests. With APC one can verify whether the output permutations are biased or not with much lower testing cost. Mathematically, in this paper we introduce the so-called “kth order permutation verification”, the underpinning notion upon which APC is based. We also compare APC with full sample space to demonstrate how well it encapsulates the statistical randomness of random permutations. We thereby provide a new method that identifies a bias that exists in the output permutations when implementing FY Shuffling through a visual ratio test and the chi-square (χ2) distribution test.
Keywords: Side channel attack; Countermeasure; Shuffling; Hiding method; Random permutation; Post-quantum cryptography

DOI： https://doi.org/10.1016/j.jisa.2024.103797

Open data URL： https://www.sciencedirect.com/science/article/pii/S2214212624001005
Learning asymmetric encryption using adversarial neural networks. Reviewed International journal

Ishak Meraouche, Sabyasachi Dutta, Haowen Tan, Kouichi Sakurai

Eng. Appl. Artif. Intell. 123(Part B): 106220 (2023) 2023.8

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Language：English Publishing type：Research paper (scientific journal)

DOI： https://doi.org/10.1016/j.engappai.2023.106220

Other Link： https://www.sciencedirect.com/science/article/abs/pii/S0952197623004049?via%3Dihub
Conditional Generative Adversarial Network-Based Image Denoising for Defending Against Adversarial Attack. Invited Reviewed International journal

#Haibo ZHANG, @Kouichi SAKURAI

IEEE Access 9: 48157-48173 (2021) 2021.7

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Language：English Publishing type：Research paper (scientific journal)

DOI： 0.1109/ACCESS.2021.3065872.

Other Link： https://ieeexplore.ieee.org/document/9378511
Neural Networks-Based Cryptography: A Survey. Reviewed International journal

#Ishak Meraouche, @Sabyasachi Dutta, @Haowen Tan, @Kouichi Sakurai:

IEEE Access 9: 124727-124740 (2021) 2021.7

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1109/ACCESS.2021.3109635
One Pixel Attack for Fooling Deep Neural Networks Reviewed International journal

Jiawei Su, Danilo Vasconcellos Vargas, Kouichi Sakurai

IEEE Transactions on Evolutionary Computation 23 ( 5 ) 828 - 841 2019.10

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1109/TEVC.2019.2890858
Light Weight Write Mechanism for Cloud Data Reviewed International journal

Mosarrat Jahan, Mohsen Rezvani, Qianrui Zhao, Partha Sarathi Roy, Kouichi Sakurai, Aruna Seneviratne, Sanjay Jha

IEEE Transactions on Parallel and Distributed Systems 29 ( 5 ) 1131 - 1146 2018.5

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1109/TPDS.2017.2782253
A proposal of event study methodology with Twitter sentimental analysis for risk management. Reviewed International journal

Tomohisa ISHIKAWA, Kouichi Sakurai

Proceedings of the 11th International Conference on Ubiquitous Information Management and Communication, IMCOM 2017, Beppu, Japan, January 5-7, 2017. ACM 2017, 2017.1

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Language：English Publishing type：Research paper (international conference proceedings)

Other Link： http://dl.acm.org/citation.cfm?id=3022240
Character-based symmetric searchable encryption and its implementation and experiment on mobile devices. Reviewed International journal

Takanori SSUGA, Takashi NISHIDE, Kouichi Sakurai

Security and Communication Networks 9 ( (12) ) 1717 - 1725 2016.8

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Language：English Publishing type：Research paper (scientific journal)

DOI： DOI: 10.1002/sec.876

Other Link： http://onlinelibrary.wiley.com/doi/10.1002/sec.876/abstract
A Hybrid Encryption Scheme with Key-cloning Protection: User / Terminal Double Authentication via Attributes and Fingerprints Invited Reviewed International journal

Chunlu Chen, Hiroaki ANADA, Junpei Kawamoto, Kouichi Sakurai

Journal of Internet Services and Information Security, Volume 6 2016.5

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Language：English Publishing type：Research paper (scientific journal)
PLAINTEXT CHECKABLE ENCRYPTION WITH DESIGNATED CHECKER Reviewed International journal

Angsuman Das, Avisheck Adhikari, Kouichi Sakurai

ADVANCES IN MATHEMATICS OF COMMUNICATIONS 9 ( 1 ) 2015.2

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.3934/amc.2015.9.37
Fast Implementation of KCipher-2 for Software and Hardware Reviewed

Yuto Nakano, Kazuhide Fukushima, Shinsaku Kiyomoto, Tsukasa Ishiguro, Yutaka Miyake,, Toshiaki Tanaka, Kouichi Sakurai

IEICE Trans. 97 ( D(1) ) 43 - 52 2014.1

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Language：English Publishing type：Research paper (scientific journal)
Secure and Privacy Preserving Hierarchical Wireless Sensor Networks using Hybrid Key Management Technique

Sushimita Ruj, Kouichi Sakurai

2013 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM) 2013.12

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Language：English

DOI： 10.1109/GLOCOM.2013.6831104
K2: A Stream Cipher Algorithm using Dynamic Feedback Control. Reviewed International journal

Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai:

SECRYPT 2007 2007.7

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Language：English Publishing type：Research paper (international conference proceedings)
Addressing causality: participatory evaluation on improvisational drama workshops for people with dementia and their carers

Nakamura, M; Sejima, K; Sakurai, K; Nagashima, Y; Yao, YY

CULTURAL TRENDS 2024.9 （ ISSN:0954-8963 eISSN:1469-3690 ）

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DOI： 10.1080/09548963.2024.2402863

Web of Science
FOREWORD

SAKURAI Kouichi

IEICE Transactions on Information and Systems E107.D ( 9 ) 1110 - 1111 2024.9 （ ISSN:09168532 eISSN:17451361 ）

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Language：English Publisher：The Institute of Electronics, Information and Communication Engineers

DOI： 10.1587/transinf.2023bcf0001

CiNii Research
Special Section on Security and Privacy in Blockchain

Sakurai, K

IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS E107D ( 9 ) 1110 - 1111 2024.9 （ ISSN:0916-8532 eISSN:1745-1361 ）

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Web of Science
A statistical verification method of random permutations for hiding countermeasure against side-channel attacks

Park, JY; Ju, JW; Lee, WN; Kang, BG; Kachi, Y; Sakurai, K

JOURNAL OF INFORMATION SECURITY AND APPLICATIONS 84 2024.8 （ ISSN:2214-2126 eISSN:2214-2134 ）

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Publisher：Journal of Information Security and Applications

Hiding countermeasure is among the best-known secure implementation techniques designed to counteract side-channel attacks. It uses a permutation algorithm to shuffle data. In today's Post-Quantum Cryptography (PQC), hiding countermeasure has earned the limelight for its “shufflability” in lattice-based, and code-based, cryptographic algorithms. In this narrative, most importantly, as a rule, fast generation of permutations is paramount to both efficacy and security of an algorithm. The Fisher–Yates (FY) shuffling method has long been a popular choice for this purpose: the FY method generates randomly shuffled (finite) indices. However, despite its theoretical verity, with the FY method we anticipate the following risks of misuse, which can lead to biased shuffling sequences: (i) incorrect implementation, (ii) poor random source, and (iii) the chosen random number being too small. In this paper, we introduce a new statistical test called “approximate permutation criterion” (“APC”). We use it to examine some known cases of misused FY shuffling (i–iii). APC takes into consideration the fact that the super-exponential rate of growth of the factorial function N!, which represents the number of permutations of N indices, defies any meaningful form of statistical tests. With APC one can verify whether the output permutations are biased or not with much lower testing cost. Mathematically, in this paper we introduce the so-called “kth order permutation verification”, the underpinning notion upon which APC is based. We also compare APC with full sample space to demonstrate how well it encapsulates the statistical randomness of random permutations. We thereby provide a new method that identifies a bias that exists in the output permutations when implementing FY Shuffling through a visual ratio test and the chi-square (χ2) distribution test.

DOI： 10.1016/j.jisa.2024.103797

Web of Science

Scopus
A Design of Internet of Vehicles System Incorporating Lightweight Roadside Units and Blockchain Strategy Reviewed

Yiluo Liu, Yaokai Feng, Kouichi Sakurai

The 18th International Conference on Ubiquitous Information Management and Communication, IEEE 1 - 8 2024.1 （ ISBN:9798350331011 ）

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Publishing type：Research paper (international conference proceedings) Publisher：Proceedings of the 2024 18th International Conference on Ubiquitous Information Management and Communication, IMCOM 2024

The accelerated advancement and ubiquitous adoption of smart vehicles, coupled with the Internet of Things (IoT), has propelled the Internet of Vehicles (IoV) to prominence as a pivotal and expansive area of research within the IoT sphere. An important challenge in IoV design lies in the efficient execution of data storage and sharing mechanisms. The successful implementation of blockchain technology across various disciplines has sparked intrigue amongst researchers to unearth its potential applicability within the IoV context. In the related works, Blockchain-based IoV systems are usually composed of three layers: the vehicle layer, the roadside units (RSUs) layer, and the blockchain or cloud layer. The RSUs layer is often required to perform numerous tasks throughout the system. Stability during rush hours is worth considering. RSUs need to receive a lot of data during rush hours and may also undertake data computing tasks. Based on the characteristics of distributed ledges, the issue of substantial storage overhead looms as a complex problem with the escalating size of the block list. Although some solutions are being proposed, such as fragmented ledger, there are still security concerns. Data security cannot be guaranteed while reducing storage overhead. To combat the stability and cost concerns associated with Roadside Units (RSUs), we delegate the majority of RSU functionalities to other layers of the system. Further, we incorporate a secure blockchain strategy - deploying an outer and inner blockchain to fortify the security and resilience of the overall blockchain network. Based on the autonomous execution characteristics of smart contracts, we try to use smart contracts for data transmission. We use Solidity to write the smart contract and test it on the Remix IDE with the aim of testing the smart contract's operability in terms of data transmission. We scrutinise the data transmission process via smart contracts, and the empirical results corroborate the effectiveness of our uniquely designed process.

DOI： 10.1109/IMCOM60618.2024.10418375

Scopus

researchmap
SoK: Directions and Issues in Formal Verification of Payment Protocols

Sakurada, H; Sakurai, K

ADVANCED INFORMATION NETWORKING AND APPLICATIONS, VOL 4, AINA 2024 202 111 - 119 2024 （ ISSN:2367-4512 ISBN:978-3-031-57915-8 ）

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Publisher：Lecture Notes on Data Engineering and Communications Technologies

Consumers use various payment methods to purchase goods and services from retailers, such as cash, credit cards, debit cards, prepaid cards, and barcodes/two-dimensional codes. In the past, in the case of in-store payments using credit cards, the in-store terminal read the card number from the magnetic strip on the card and sent it with other purchase information to the credit card network. Recently, to prevent counterfeiting, the IC chip on the credit card and the in-store terminal communicates to authenticate each other and process the payment transaction. The medium of communication is not only contact but also contactless (“touch" payment), Moreover, the in-store terminal may process the payment either online or offline and optionally may require the customer to input their PIN. Various protocols and protocol flows are used depending on the medium and how the payment is processed. Credit cards are also used for remotely purchasing goods or services; in this case, other protocols and protocol flows are used. In some such protocols, researchers found serious security flaws that allow a malicious party to fraudulently purchase goods in such a way that is not allowed for legitimate customers. Such flaws must be fixed, but it is hard to fix and deploy protocols after they are widely used. Formal verification is a method to analyze and verify the security of such protocols and to detect flaws before they are widely deployed. In this paper, we will discuss the research trends in formal verification of the security of various cashless payment protocols, as well as future issues.

DOI： 10.1007/978-3-031-57916-5_10

Web of Science

Scopus
Research Directions in Formal Verification of Network Configurations Toward Verification of Mobile Networks

Sakurada H., Sakurai K.

Communications in Computer and Information Science 2095 CCIS 248 - 259 2024 （ ISSN:18650929 ISBN:9789819744640 ）

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Publisher：Communications in Computer and Information Science

This paper reviews current research trends in the formal verification of computer network configurations, specifically focusing on formal verification for software-defined networking (SDN). We explore the challenges encountered when applying formal verification, comparing its application to pre-SDN network verification efforts. Additionally, we discuss the potential application of formal verification in mobile networks. We first provide an overview of research on the formal verification of virtual LAN (VLAN) configurations, which predates the emergence of SDN. We next illustrate SDN and existing research applying formal verification to SDN. Finally, we briefly examine potential scenarios for applying formal verification to mobile networks.

DOI： 10.1007/978-981-97-4465-7_18

Scopus
Extension of Resource Authorization Method with SSI in Edge Computing

Watanabe, R; Kubota, A; Kurihara, J; Sakurai, K

ADVANCED INFORMATION NETWORKING AND APPLICATIONS, VOL 6, AINA 2024 204 385 - 394 2024 （ ISSN:2367-4512 ISBN:978-3-031-57941-7 ）

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DOI： 10.1007/978-3-031-57942-4_37

Web of Science
Experimental Exploration of the Power of Conditional GAN in Image Reconstruction-Based Adversarial Attack Defense Strategies

Zhang, HB; Sakurai, K

ADVANCED INFORMATION NETWORKING AND APPLICATIONS, VOL 3, AINA 2024 201 151 - 162 2024 （ ISSN:2367-4512 ISBN:978-3-031-57869-4 ）

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DOI： 10.1007/978-3-031-57870-0_14

Web of Science
Enhancing Security and Efficiency: A Lightweight Federated Learning Approach

Chen, CL; Wang, KIK; Li, P; Sakurai, K

ADVANCED INFORMATION NETWORKING AND APPLICATIONS, VOL 4, AINA 2024 202 349 - 359 2024 （ ISSN:2367-4512 ISBN:978-3-031-57915-8 ）

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Publisher：Lecture Notes on Data Engineering and Communications Technologies

Recently, as big data and AI technology advance, data privacy and security are increasingly critical. Federated Learning (FL) has become a key solution in machine learning to address these concerns. In this paper, we present a secure and lightweight FL scheme. It employs masking and Secret Sharing (SS) to securely aggregate data from distributed clients, thereby reducing the demands of model training on system resources. The scheme also computes data similarity among clients to evaluate each client’s contribution, defending against challenges posed by malicious clients. This approach safeguards privacy, facilitates accurate model updates, and addresses the challenges of limited resources in edge computing environments. We subjected our framework to rigorous validation using MNIST datasets. Experimental outcomes unequivocally substantiate the efficacy of our proposed methodology.

DOI： 10.1007/978-3-031-57916-5_30

Web of Science

Scopus
Design and Performance Evaluation of a Two-Stage Detection of DDoS Attacks Using a Trigger with a Feature on Riemannian Manifolds

Lyu, Y; Feng, YK; Sakurai, K

ADVANCED INFORMATION NETWORKING AND APPLICATIONS, VOL 4, AINA 2024 202 133 - 144 2024 （ ISSN:2367-4512 ISBN:978-3-031-57915-8 ）

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Publisher：Lecture Notes on Data Engineering and Communications Technologies

The DDoS attack remains one of the leading attacks today. To reduce the number of resource-consuming detection algorithm calls, the trigger-based two-stage detection approach has been proposed. In such systems, trigger mechanisms, including trigger features and threshold update algorithms, play an important role in detection performance. It is also important what features are used in the second stage of detection. In this study, 1) we introduce a Riemannian manifold metric (work) as a trigger feature for the first time since it was proven that traffic data is a Riemannian manifold; 2) we propose a new mechanism to update the trigger threshold based on historical flow data and the feedback of the second-stage detection results; 3) the feature selection algorithm ECOFS is used for the second stage detection. Experimental results using public datasets show that our proposal calls much less of the second-stage detection than the latest trigger-based two-step detection systems.

DOI： 10.1007/978-3-031-57916-5_12

Web of Science

Scopus
A Multi-Head Federated Continual Learning Approach for Improved Flexibility and Robustness in Edge Environments

Chen Chunlu, Wang Kevin I-Kai, Li Peng, Sakurai Kouichi

International Journal of Networking and Computing 14 ( 2 ) 123 - 144 2024 （ ISSN:21852839 eISSN:21852847 ）

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Language：English Publisher：IJNC Editorial Committee

In the rapidly evolving field of machine learning, the adoption of traditional approaches often encounters limitations, such as increased computational costs and the challenge of catastrophic forgetting, particularly when models undergo retraining with new datasets. This issue is especially pronounced in environments that require the ability to swiftly adapt to changing data landscapes. Continual learning emerges as a pivotal solution to these challenges, empowering models to assimilate new information while preserving the knowledge acquired from previous learning phases. Despite its benefits, the continual learning process's inherent need to retain prior knowledge introduces a potential risk for information leakage.

Addressing these challenges, we propose a Federated Continual Learning (FCL) framework with a multi-head neural network model. This approach blends the privacy-preserving capabilities of Federated Learning (FL) with the adaptability of continual learning, ensuring both data privacy and continuous learning in edge computing environments. Moreover, this framework enhances our approach to adversarial training, as the constant influx of diverse and complex training data allows the model to improve its understanding and adaptability, thereby strengthening its defenses against adversarial threats.
Our system features a architecture with dedicated fully-connected layers for each task, ensuring that unique features pertinent to each task are accurately captured and preserved over the model's lifetime. Data undergoes processing through these task-specific layers before a final label is determined, based on the highest prediction value. This method exploits the model's full range of knowledge, significantly boosting prediction accuracy. We have conducted thorough evaluations of our FCL framework on two benchmark datasets, MNIST and CIFAR-10, with the results clearly validating the effectiveness of our approach.

DOI： 10.15803/ijnc.14.2_123

CiNii Research
Secured tracing for group signatures from attribute-based encryption

Perera, MNS; Matsunaka, T; Yokoyama, H; Sakurai, K

CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE 36 ( 15 ) 2023.12 （ ISSN:1532-0626 eISSN:1532-0634 ）

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Publisher：Concurrency and Computation: Practice and Experience

This article presents a tracing mechanism for group signatures answering the security threats of malicious authorities and users' forgeries. The proposal weakens the high trust placed on the centralized tracing party in previous group signatures by decentralizing tracing power using a multiple tracer setting and limiting the tracers' access using attribute-based encryption and the requirement of the group manager's agreement. We allow the group manager to control tracers identifying his group users. Instead of a centralized tracer, our setting has multiple tracers possessing attribute sets. Thus, after getting the group manager's permission, a tracer should satisfy the access policy in a given signature to identify the signer. On the other hand, our group signature scheme decentralizes the tracing key generation and removes the group manager's tracing ability. Thus, it ensures that only the attribute-satisfying and permitted tracers can identify the signer. Moreover, this article delivers security against malicious users. It presents a verification process of access policy of the signatures to prevent users from utilizing invalid attributes for signing. In addition, the article delivers a collaborative tracing mechanism to satisfy attribute sets that a tracer fails to fulfill alone for identifying a signer. Thus, our tracing mechanism ensures security against malicious authorities and group users in group signatures. The article gives the general construction of the scheme and discusses the security.

DOI： 10.1002/cpe.7986

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Scopus
An Efficient Vehicle-Assisted Aggregate Authentication Scheme for Infrastructure-Less Vehicular Networks

Tan, HW; Zheng, WY; Vijayakumar, P; Sakurai, K; Kumar, N

IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS 24 ( 12 ) 15590 - 15600 2023.12 （ ISSN:1524-9050 eISSN:1558-0016 ）

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Publisher：IEEE Transactions on Intelligent Transportation Systems

In recent years, growing research interest from both industry and academia has been aroused to the vehicular networks, which is regarded as the fundamental component of the modern intelligent transportation system (ITS). Lots of remarkable research outputs with respect to secure vehicular data interactions and user privacy preservation has been witnessed. However, the existing schemes all focus on the common vehicular communication scenarios where facilities are deployed, whereas the secure data exchange in the abnormal infrastructure-less vehicular environment has not been properly investigated. To deal with unpredictable abnormal situations caused by artificial or natural disasters such as earthquakes and floods, a distinctive vehicle-assisted aggregate authentication mechanism for infrastructure-less vehicular networks is presented in this paper. With assistance from the neighboring vehicles, the homomorphic signature involving all requesting vehicles is generated and forwarded to the remaining functional RSUs. Meanwhile, vehicular group communication among the validated entities is enabled. Additionally, the fault-tolerant verification method is adopted such that the ineffective entities can be easily distinguished and removed without interfering with other requesting vehicles. The security proofs and discussions regarding vital security properties are presented, while the performance analysis follows. Compared with the state-of-the-art, advantages in terms of security and performance properties can be proved.

DOI： 10.1109/TITS.2022.3176406

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Scopus
Application and Limitations of Digital Signature Schemes for Implementing Non-Fungible Token (NFT): Exploring Designated Confirmer Signatures and Blockchain Technology for Non-Fungible Token (NFT) Implementation

Ikebe K., Hata Y., Nakamura T., Isohara T., Sakurai K.

ACM International Conference Proceeding Series 119 - 125 2023.10 （ ISBN:9798400708534 ）

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Publisher：ACM International Conference Proceeding Series

The ERC721 standard defines a Non-Fungible Token (NFT) as an identifier that uniquely identifies digital data recorded on a blockchain. The NFT currently in use claim to ensure the uniqueness of the contents associated with the NFT by taking advantage of the tamper-resistant characteristics of the blockchain data. Besides, digital signatures based on public-key encryption is a representative technique to prevent digital data from being falsified, and its application to NFT is also discussed. In this study, we first consider an NFT implementation by applying a designated confirmer signature using an interactive verification method without using blockchain technology. We design an NFT issuance protocol that guarantees the uniqueness of data with a designated confirmer signature, and evaluate the security of the protocol. Moreover, we compare it with existing blockchain implementations. By analyzing the both methods, we aim to provide insights into the potential applications and performance in using designated confirmer signatures for NFT. Our findings contribute to the ongoing research on secure and efficient mechanisms for ensuring the integrity and uniqueness of digital assets in decentralized systems.

DOI： 10.1145/3634814.3634831

Scopus
Phoenix: A Live Upgradable Blockchain Client

Wang, CM; Li, P; Fan, XP; Tang, ZY; Zeng, YL; Sakurai, K

IEEE TRANSACTIONS ON SUSTAINABLE COMPUTING 8 ( 4 ) 703 - 714 2023.10 （ ISSN:2377-3782 ）

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Publisher：IEEE Transactions on Sustainable Computing

Blockchain is an important supporting technology for various sustainable systems. It relies on a number of distributed nodes running blockchain client software, which is responsible for some critical tasks, such as communicating with other nodes and generating new blocks. However, the quick evolution of blockchain technology brings crucial challenges to blockchain client design. After carefully examining existing blockchain client software, we have identified a critical weakness: Blockchain clients are weak in supporting live upgrades, resulting in a blockchain fork that incurs security concerns and risks. In this article, we propose Phoenix, a novel blockchain client design that is live upgradable. Phoenix uses blockchain service encapsulation to decouple blockchain services. Based on service encapsulation, we propose a live upgrade scheme that packs upgrade codes into blockchain transactions and uses a Just-In-Time engine to avoid service interruption. A parallel execution engine is developed to increase service efficiency. We evaluated Phoenix on a 51-node blockchain, and experimental results show that Phoenix outperforms existing solutions in overhead and upgrade latency.

DOI： 10.1109/TSUSC.2023.3282586

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Scopus
Learning asymmetric encryption using adversarial neural networks

Meraouche, I; Dutta, S; Tan, HW; Sakurai, K

ENGINEERING APPLICATIONS OF ARTIFICIAL INTELLIGENCE 123 2023.8 （ ISSN:0952-1976 eISSN:1873-6769 ）

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Publisher：Engineering Applications of Artificial Intelligence

We propose a multi-agent adversarial neural networks model where a sender (Alice) and a receiver (Bob) are able to learn to use a pair of public/private keys in order to protect their communication from one or more attackers/eavesdroppers. Existing work in the field required shared symmetric information between Alice and Bob before initiating the training process. To the best of our knowledge, this is the first work in which Alice and Bob with asymmetric information can train themselves to protect their communication. Our initial model setup contains five agents: sender Alice, receiver Bob, eavesdropper Eve and two neural networks (we call them public keys generator and private keys generator) that, based on a (secret) random noise from Bob, will generate a pair of public/private keys that allows Alice to encrypt a message with the public key and Bob to decrypt the message with the private key while preventing Eve from decrypting the secret message using the public key. We show that the neural networks are able to establish a communication and secure it from Eve. Finally, we consider adversaries stronger than Eve to model leakage attacks, chosen plaintext attacks (CPA) and test the distinguishability between ciphertexts. The last three experiments show that neural networks (with asymmetric information) can secure the communication providing stronger security guarantees and resilience to leakage attacks which may include leakage from the private key.

DOI： 10.1016/j.engappai.2023.106220

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Electroencephalography signals-based sparse networks integration using a fuzzy ensemble technique for depression detection

Soni, S; Seal, A; Mohanty, SK; Sakurai, K

BIOMEDICAL SIGNAL PROCESSING AND CONTROL 85 2023.8 （ ISSN:1746-8094 eISSN:1746-8108 ）

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Publisher：Biomedical Signal Processing and Control

Today, depression is a psychological condition that affects many individuals globally and, if untreated, can negatively impact one's emotions and lifestyle quality. Machine learning (ML) techniques have lately been used to identify mental illnesses using Electroencephalography (EEG) data. These signals are difficult and time-consuming to interpret visually because they are intricate, non-static, and irregular. As a result, computer-assisted early depression detection systems are highly desirable. The study proposes a feature extraction method for each EEG signal channel by building a sparse graph from the complete complex network using a k-round minimum spanning tree. The subjects in the dataset depict the graph's nodes, and their relationship represents the edge weights, which are determined using the Euclidean distance. Then, features from the sparse graph are extracted using the Node2vec approach and fed into classifiers to get a probability score. Finally, a fuzzy ensemble strategy is exploited at the decision level for integrating probability scores to distinguish depressed subjects from healthy people. Several experiments comparing the proposed method to seven other approaches on four publicly available datasets demonstrate the importance and superiority of the proposed strategy. The K-Nearest Neighbor classifier used in the suggested method produces the highest classification accuracy across the four datasets, with scores of 0.916, 0,960, and 0.940 respectively.

DOI： 10.1016/j.bspc.2023.104873

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Ameliorative effects of Fingolimod (FTY720) on microglial activation and psychosis-related behavior in short term cuprizone exposed mice

Li, SY; Sakurai, K; Ohgidani, M; Kato, TA; Hikida, T

MOLECULAR BRAIN 16 ( 1 ) 59 2023.7 （ eISSN:1756-6606 ）

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Language：English

DOI： 10.1186/s13041-023-01047-5

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PubMed
Current Perspectives on Securing Critical Infrastructures' Supply Chains

Roman, R; Alcaraz, C; Lopez, J; Sakurai, K

IEEE SECURITY & PRIVACY 21 ( 4 ) 29 - 38 2023.7 （ ISSN:1540-7993 eISSN:1558-4046 ）

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Publisher：IEEE Security and Privacy

Digitalization and industrial paradigms are transforming the landscape of critical infrastructures and supply chains. With emerging technologies, it is possible to deploy services to enhance trust and transparency, but they are susceptible to threats, as discussed in this article.

DOI： 10.1109/MSEC.2023.3247946

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A Review on Machine Unlearning

Zhang H., Nakamura T., Isohara T., Sakurai K.

SN Computer Science 4 ( 4 ) 2023.7 （ ISSN:2662995X ）

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Publisher：SN Computer Science

Recently, an increasing number of laws have governed the useability of users’ privacy. For example, Article 17 of the General Data Protection Regulation (GDPR), the right to be forgotten, requires machine learning applications to remove a portion of data from a dataset and retrain it if the user makes such a request. Furthermore, from the security perspective, training data for machine learning models, i.e., data that may contain user privacy, should be effectively protected, including appropriate erasure. Therefore, researchers propose various privacy-preserving methods to deal with such issues as machine unlearning. This paper provides an in-depth review of the security and privacy concerns in machine learning models. First, we present how machine learning can use users’ private data in daily life and the role that the GDPR plays in this problem. Then, we introduce the concept of machine unlearning by describing the security threats in machine learning models and how to protect users’ privacy from being violated using machine learning platforms. As the core content of the paper, we introduce and analyze current machine unlearning approaches and several representative results and discuss them in the context of the data lineage. Furthermore, we also discuss the future research challenges in this field.

DOI： 10.1007/s42979-023-01767-4

Scopus
小さな直腸神経内分泌腫瘍に対する縫縮法併用内視鏡的粘膜下層切除術と内視鏡的粘膜下層剥離術の比較　多施設後方視的検討(Comparison of endoscopic submucosal resection with ligation and endoscopic submucosal dissection for small rectal neuroendocrine tumors: A multicenter retrospective study)

Matsuno Kenshi, Miyamoto Hideaki, Kitada Hideki, Yoshimatsu Shinichi, Tamura Fumio, Sakurai Kouichi, Fukubayashi Kotaro, Shono Takashi, Setoyama Hiroko, Matsuyama Taichi, Suko Shinichiro, Narita Rei, Honda Munenori, Tateyama Masakuni, Naoe Hideaki, Morinaga Jun, Tanaka Yasuhito, Gushima Ryosuke

DEN Open 3 ( 1 ) 1 of 8 - 8 of 8 2023.4

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Language：English Publisher：John Wiley & Sons Australia, Ltd

縫縮法併用内視鏡的粘膜下層切除術(ESMR-L)および内視鏡的粘膜下層剥離術(ESD)はともに<10mmの直腸神経内分泌腫瘍(NET)に対する標準的治療であるが、どちらの成績が良好かに関する合意は得られていない。本稿では、直腸NETに対するESMR-LとESDの有用性を比較した。本研究は、多施設共同後方視的コホート研究で、検討対象は小さな直腸NETに対してESMR-LまたはESDを施行した205例とした。治療成績を単変量解析、多変量解析および傾向スコアを用いた逆確率治療重み付け法(IPTW)で評価した。サブグループ解析として、技術的成功率に対する内視鏡医の経験の影響を評価した。89例がESMR-Lで、116例がESDで治療された。RO切除率には両群間で有意差は認められなかった(90%対92%、P=0.73)。処置時間はESMR-LがESDよりも有意に短く(17分対52分、P<0.01)、入院期間もESMR-L群がESD群よりも有意に短かった(3日対5日、P<0.01)。これらの結果は、IPTW補正後の多変量解析によっても確認された。ESDの処置時間は、経験の浅い内視鏡医で有意に長かったが(49分対70分、P=0.02)、ESMR-Lでは経験による影響は認められなかった(17分対17分、P=0.27)。小さな直腸NETに対して、完全切除率はESMR-LおよびESDのどちらも同様に高かった。しかし、処置時間が短いこと、入院期間が短いことから、ESMR-Lが、特に経験の浅い内視鏡医にとって、より有用性の高い治療法である。
A Survey on Feature Selection Techniques Based on Filtering Methods for Cyber Attack Detection

Lyu Yang, Feng Yaokai, Sakurai Kouichi

Information 14 ( 3 ) 191 2023.3 （ eISSN:20782489 ）

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Language：English

Cyber attack detection technology plays a vital role today, since cyber attacks have been causing great harm and loss to organizations and individuals. Feature selection is a necessary step for many cyber-attack detection systems, because it can reduce training costs, improve detection performance, and make the detection system lightweight. Many techniques related to feature selection for cyber attack detection have been proposed, and each technique has advantages and disadvantages. Determining which technology should be selected is a challenging problem for many researchers and system developers, and although there have been several survey papers on feature selection techniques in the field of cyber security, most of them try to be all-encompassing and are too general, making it difficult for readers to grasp the concrete and comprehensive image of the methods. In this paper, we survey the filter-based feature selection technique in detail and comprehensively for the first time. The filter-based technique is one popular kind of feature selection technique and is widely used in both research and application. In addition to general descriptions of this kind of method, we also explain in detail search algorithms and relevance measures, which are two necessary technical elements commonly used in the filter-based technique.

CiNii Research
特集：「AI セキュリティの研究動向」特集「AI セキュリティの研究動向」にあたって

大塚玲, 櫻井幸一

人工知能 38 ( 2 ) 178 - 179 2023.3 （ ISSN:21882266 eISSN:24358614 ）

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Language：Japanese Publisher：一般社団法人人工知能学会

DOI： 10.11517/jjsai.38.2_178

CiNii Research
機械アンラーニングの研究に関する現状と課題

張海波, 櫻井幸一

人工知能 38 ( 2 ) 197 - 205 2023.3 （ ISSN:21882266 eISSN:24358614 ）

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Language：Japanese Publisher：一般社団法人人工知能学会

DOI： 10.11517/jjsai.38.2_197

CiNii Research
A Survey on Feature Selection Techniques Based on Filtering Methods for Cyber Attack Detection Reviewed

Lyu, Y; Feng, YK; Sakurai, K

INFORMATION 14 ( 3 ) 2023.3 （ eISSN:2078-2489 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：Information (Switzerland)

Cyber attack detection technology plays a vital role today, since cyber attacks have been causing great harm and loss to organizations and individuals. Feature selection is a necessary step for many cyber-attack detection systems, because it can reduce training costs, improve detection performance, and make the detection system lightweight. Many techniques related to feature selection for cyber attack detection have been proposed, and each technique has advantages and disadvantages. Determining which technology should be selected is a challenging problem for many researchers and system developers, and although there have been several survey papers on feature selection techniques in the field of cyber security, most of them try to be all-encompassing and are too general, making it difficult for readers to grasp the concrete and comprehensive image of the methods. In this paper, we survey the filter-based feature selection technique in detail and comprehensively for the first time. The filter-based technique is one popular kind of feature selection technique and is widely used in both research and application. In addition to general descriptions of this kind of method, we also explain in detail search algorithms and relevance measures, which are two necessary technical elements commonly used in the filter-based technique.

DOI： 10.3390/info14030191

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A two-stage detection system of DDoS attacks in SDN using a trigger with multiple features and self-adaptive thresholds Reviewed

Muyuan Niu, Yaokai Feng, Kouichi Sakurai

17th International Conference on Ubiquitous Information Management and Communication, IEEE 1 - 7 2023.1

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Language：English Publishing type：Research paper (international conference proceedings)

DOI： 10.1109/IMCOM56909.2023

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Cybersecurity Case for Automotive Functionalities using AI/ML

MIZOGUCHI Seiichiro, SAKURAI Kouichi

Proceedings of the Annual Conference of JSAI JSAI2023 ( 0 ) 4D2GS1105 - 4D2GS1105 2023 （ eISSN:27587347 ）

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Language：Japanese Publisher：The Japanese Society for Artificial Intelligence

Vehicle manufacturers must explain that their vehicles meet cybersecurity requirements according to UN-R155 regulations. Since self-driving cars use AI/ML technology, it is necessary to consider security for AL/ML technology. This paper describes an explanatory strategy for the cybersecurity argumentation of automotive functions using AI/ML technology.

DOI： 10.11517/pjsai.jsai2023.0_4d2gs1105

CiNii Research
Status and Issue of Research and Application of Machine Unlearning

SAKURAI Kouichi

Proceedings of the Annual Conference of JSAI JSAI2023 ( 0 ) 2L1GS1105 - 2L1GS1105 2023 （ eISSN:27587347 ）

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Language：Japanese Publisher：The Japanese Society for Artificial Intelligence

Two topics with related machine unlearning are introduced. The first one is the pioneering domestic research in the 2010, which. was presented before proposing the notion of machine unlearning on 2015. The second one is about Federated Unlearning, which is getting hot in recent research as unlearn-version of Google’s federated learning. This report is a kind of addendum to the undersigned author’s article in the special section entitled "Research Trends in AI Security" on Artificial Intelligence Vol. 38 No. 2 (March 2023).

DOI： 10.11517/pjsai.jsai2023.0_2l1gs1105

CiNii Research
Towards Evaluating the Security of Human Computable Passwords Using Neural Networks

Murata I., He P., Gu Y., Sakurai K.

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 13720 LNCS 303 - 312 2023 （ ISSN:03029743 ISBN:9783031256585 ）

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Publisher：Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

Passwords are playing a major role for authentication in our daily life. However contemporary passwords are typically either difficult to remember or vulnerable to various attacks. In 2017, Blocki, Blum, Datta and Vempala introduced the concept of human computable passwords as a promising authentication method. The fundamental concerns for designing human computable passwords are their usability and security. So far, the security evaluation on human computable passwords authentication schemes is mainly based on complexity-theoretic analysis. In this paper, we initially investigate the security of human computable passwords against neural network-based adversarial attacks. Specifically, we employ the typical multilayer perceptron (MLP) model to attempt to attack the human computable passwords authentication scheme proposed by Blocki-Blum-Datta-Vempala. We present implementation results and the corresponding analysis as well. Our results imply that it is possible for an MLP to learn a simple function, but is difficult for an MLP to learn piecewise functions well.

DOI： 10.1007/978-3-031-25659-2_22

Scopus
POSTER: Advancing Federated Edge Computing with Continual Learning for Secure and Efficient Performance

Chen, CL; Wang, KIK; Li, P; Sakurai, K

APPLIED CRYPTOGRAPHY AND NETWORK SECURITY WORKSHOPS, ACNS 2023 SATELLITE WORKSHOPS, ADSC 2023, AIBLOCK 2023, AIHWS 2023, AIOTS 2023, CIMSS 2023, CLOUD S&P 2023, SCI 2023, SECMT 2023, SIMLA 2023 13907 685 - 689 2023 （ ISSN:0302-9743 ISBN:978-3-031-41180-9 eISSN:1611-3349 ）

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Publisher：Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

Federated Learning (FL) and the Internet of Things (IoT) have transformed data processing and analysis, overcoming traditional cloud computing limitations. However, challenges such as catastrophic forgetting in continuous training scenarios arise. To address these, we propose an FL framework that supports continual learning while enhancing system security. We preserve critical knowledge through the incorporation of Knowledge Distillation (KD), addressing the issue of catastrophic forgetting. In addition, we have integrated encryption techniques to secure the updated parameters of clients from potential threats posed by attackers.

DOI： 10.1007/978-3-031-41181-6_40

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POSTER: A Fine-Grained Metric for Evaluating the Performance of Adversarial Attacks and Defenses

Haibo Zhang, Zhihua Yao, Kouichi Sakurai

Lecture Notes in Computer Science 13907 690 - 694 2023 （ ISSN:0302-9743 ISBN:978-3-031-41180-9 eISSN:1611-3349 ）

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Publishing type：Part of collection (book) Publisher：Springer Nature Switzerland

DOI： 10.1007/978-3-031-41181-6_41

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Group Oriented Attribute-Based Encryption Scheme from Lattices with the Employment of Shamir's Secret Sharing Scheme.

Maharage Nisansala Sevwandi Perera, Toru Nakamura, Takashi Matsunaka, Hiroyuki Yokoyama, Kouichi Sakurai

NSS 13983 LNCS 155 - 176 2023 （ ISSN:03029743 ISBN:9783031398278 ）

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Publishing type：Research paper (international conference proceedings)

DOI： 10.1007/978-3-031-39828-5_9

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Other Link： https://dblp.uni-trier.de/db/conf/nss/nss2023.html#PereraNMYS23
Flexibility and Privacy: A Multi-Head Federated Continual Learning Framework for Dynamic Edge Environments

Chen C., Wang K.I.K., Li P., Sakurai K.

Proceedings - 2023 11th International Symposium on Computing and Networking, CANDAR 2023 1 - 10 2023 （ ISBN:9798350306705 ）

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Publisher：Proceedings - 2023 11th International Symposium on Computing and Networking, CANDAR 2023

Federated Learning (FL) and the Internet of Things (IoT) have revolutionized data processing and analysis, overcoming the traditional limitations of cloud computing. However, traditional machine learning strategies lead to increased costs and catastrophic forgetting due to model retraining with new datasets. Continual learning has been proposed to counter this, enabling models to adapt to new data while preserving previous knowledge, which is beneficial for dynamic edge environments. Despite these advantages, the retention of previous knowledge during the continual learning process may lead to the information leakage. To address the inherent challenges of multitask scenarios, we present a Federated Continual Learning (FCL) framework that integrates the privacy-preserving benefits of Federated Learning (FL) into a continual learning system, ensuring both continual learning and privacy preservation in edge computing data processing and analysis. Specifically, our architecture introduces dedicated fully-connected layers for each task. This architecture ensures that distinctive features pertinent to each task are not only captured but also preserved throughout the model's lifespan. Within our framework, data is processed via task-specific layers. Subsequently, the final label is determined by associating it with the paramount prediction value, thus capitalizing on the model's comprehensive knowledge reservoir to bolster prediction accuracy. We subjected our FCL framework to rigorous validation using two benchmark datasets: MNIST and CFAR-10. Experimental outcomes unequivocally substantiate the efficacy of our proposed methodology.

DOI： 10.1109/CANDAR60563.2023.00009

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Factors associated with postpartum smoking relapse at early postpartum period of Japanese women in the Japan Environmental and Children's Study

Anai, A; Asato, K; Tatsuta, N; Sakurai, K; Ota, C; Kuriyama, S; Sugawara, J; Arima, T; Yaegashi, N; Nakai, K

ENVIRONMENTAL HEALTH AND PREVENTIVE MEDICINE 28 56 2023 （ ISSN:1342-078X eISSN:1347-4715 ）

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Language：English

DOI： 10.1265/ehpm.23-00059

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PubMed
Explicit Non-malleable Codes from Bipartite Graphs

Shohei Satake, Yujie Gu, Kouichi Sakurai

Arithmetic of Finite Fields 13638 221 - 236 2023 （ ISSN:0302-9743 ISBN:978-3-031-22943-5 eISSN:1611-3349 ）

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Publishing type：Part of collection (book) Publisher：Springer International Publishing

DOI： 10.1007/978-3-031-22944-2_14

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Eliminating Adversarial Perturbations Using Image-to-Image Translation Method

Haibo Zhang, Zhihua Yao, Kouichi Sakurai

Lecture Notes in Computer Science 13907 601 - 620 2023 （ ISSN:0302-9743 ISBN:978-3-031-41180-9 eISSN:1611-3349 ）

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Publishing type：Part of collection (book) Publisher：Springer Nature Switzerland

DOI： 10.1007/978-3-031-41181-6_32

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A two-stage detection system of DDoS attacks in SDN using a trigger with multiple features and self-adaptive thresholds

Niu M., Feng Y., Sakurai K.

Proceedings of the 2023 17th International Conference on Ubiquitous Information Management and Communication, IMCOM 2023 2023 （ ISBN:9781665453486 ）

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Publisher：Proceedings of the 2023 17th International Conference on Ubiquitous Information Management and Communication, IMCOM 2023

Software-defined networking (SDN) has received a lot of attention in academia and industry in recent years, and DDoS attacks are still one of the most dangerous threats. As cyberattacks become more sophisticated, detection systems also become more complex and computationally intensive, for example, Deep Learning-based detection. Against this background, two-stage detection is proposed, in which a trigger is introduced before the complex detection being invoked. That is, the heavy detection module is called only when the requirements in the trigger are satisfied. Clearly, the triggering mechanism plays an important role in such detection systems as it determines when the second stage is invoked. Most of the existing relevant studies utilize one feature and a fixed threshold. However, it is not easy to predefine suitable thresholds in practice, and one feature is often not sufficient for effective trigger conditions that have a significant impact on detection performance of the whole detection system. The latest related work uses dynamic thresholding, but still only one feature, and the threshold adaptation mechanism is too simplistic, which make it too difficult to be used in real applications. Moreover, the performance of the approach in the most of related works are verified only using simulated data. In this study, we increase the number of features and optimized the threshold adjustment method in the trigger. In addition, in the detection module of the second stage, six features carefully determined from traffic bytes, packets, and IP addresses are used. The performance of the proposal is demonstrated in a simulated SDN environment using a public dataset. The experimental results indicate that the times of calling the computationally intensive detection module is significantly reduced, while at the same time the detection performance of the overall system is not degraded.

DOI： 10.1109/IMCOM56909.2023.10035661

Scopus
A Design of Network Attack Detection Using Causal and Non-causal Temporal Convolutional Network

Pengju He, Haibo Zhang, Yaokai Feng, Kouichi Sakurai

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 14299 513 - 523 2023 （ ISSN:0302-9743 ISBN:978-3-031-45932-0 eISSN:1611-3349 ）

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Publishing type：Research paper (international conference proceedings)

Temporal Convolution Network(TCN) has recently been introduced in the cybersecurity field, where two types of TCNs that consider causal relationships are used: causal TCN and non-causal TCN. Previous researchers have utilized causal and non-causal TCNs separately. Causal TCN can predict real-time outcomes, but it ignores traffic data from the time when the detection is activated. Non-causal TCNs can forecast results more globally, but they are less real-time. Employing either causal TCN or non-causal TCN individually has its drawbacks, and overcoming these shortcomings has become an important topic. In this research, we propose a method that combines causal and non-causal TCN in a contingent form to improve detection accuracy, maintain real-time performance, and prevent long detection time. Additionally, we use two datasets to evaluate the performance of the proposed method: NSL-KDD, a well-known dataset for evaluating network intrusion detection systems, and MQTT-IoT-2020, which simulates the MQTT protocol, a standard protocol for IoT machine-to-machine communication. The proposed method in this research increased the detection time by about 0.1ms compared to non-causal TCN when using NSL-KDD, but the accuracy improved by about 1.5%, and the recall improved by about 4%. For MQTT-IoT-2020, the accuracy improved by about 3%, and the recall improved by about 7% compared to causal TCN, but the accuracy decreased by about 1% compared to non-causal TCN. The required time was shortened by 30ms (around 30%), and the recall was improved by about 7%.

DOI： 10.1007/978-3-031-45933-7_30

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On the Information-Theoretic Security of Combinatorial All-or-Nothing Transforms

Gu, YJ; Akao, S; Esfahani, NN; Miao, Y; Sakurai, K

IEEE TRANSACTIONS ON INFORMATION THEORY 68 ( 10 ) 6904 - 6914 2022.10 （ ISSN:0018-9448 eISSN:1557-9654 ）

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Publisher：IEEE Transactions on Information Theory

All-or-nothing transforms (AONTs) were proposed by Rivest as a message preprocessing technique for encrypting data to protect against brute-force attacks, and have numerous applications in cryptography and information security. Later the unconditionally secure AONTs and their combinatorial characterization were introduced by Stinson. Informally, a combinatorial AONT is an array with the unbiased requirements and its security properties in general depend on the prior probability distribution on the inputs s-tuples. Recently, it was shown by Esfahani and Stinson that a combinatorial AONT has perfect security provided that all the inputs s-tuples are equiprobable, and has weak security provided that all the inputs s-tuples are with non-zero probability. This paper aims to explore on the gap between perfect security and weak security for combinatorial (t,s,v)-AONTs. Concretely, we consider the typical scenario that all the s inputs take values independently (but not necessarily identically) and quantify the amount of information H(X|Y) about any t inputs X that is not revealed by any s-t outputs Y. In particular, we establish the general lower and upper bounds on H(X|Y) for combinatorial AONTs using information-theoretic techniques, and also show that the derived bounds can be attained in certain cases. Furthermore, the discussions are extended for the security properties of combinatorial asymmetric AONTs.

DOI： 10.1109/TIT.2022.3174008

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On the Security Properties of Combinatorial All-or-nothing Transforms

Yujie Gu, Sonata Akao, Navid Nasr Esfahani, Ying Miao, Kouichi Sakurai

2022 IEEE International Symposium on Information Theory (ISIT) 2022-June 1447 - 1452 2022.6 （ ISSN:21578095 ISBN:9781665421591 ）

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Publishing type：Research paper (international conference proceedings) Publisher：IEEE

DOI： 10.1109/isit50566.2022.9834366

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On the security properties of combinatorial all-or-nothing transforms Invited Reviewed International journal

Yujie Gu, Sonata Akao, Navid Nasr Esfahani, Ying Miao, and Kouichi Sakurai

Proceedings of 2022 IEEE International Symposium on Information Theory 2022.6

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Certificate Management Scheme for VANETs Using Blockchain Structure.

Maharage Nisansala Sevwandi Perera, Toru Nakamura, Masayuki Hashimoto, Hiroyuki Yokoyama, Chen-Mou Cheng, Kouichi Sakurai

Cryptography(Cryptogr.) 6 ( 2 ) 20 - 20 2022.6 （ eISSN:2410-387X ）

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Publishing type：Research paper (scientific journal)

DOI： 10.3390/cryptography6020020

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Quantum secure privacy preserving technique to obtain the intersection of two datasets for contact tracing.

Sumit Kumar Debnath, Vikas Srivastava, Tapaswini Mohanty, Nibedita Kundu, Kouichi Sakurai

J. Inf. Secur. Appl. 66 103127 - 103127 2022.5 （ ISSN:2214-2126 eISSN:2214-2134 ）

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Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.jisa.2022.103127

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A Survey on Group Signatures and Ring Signatures: Traceability vs. Anonymity.

Maharage Nisansala Sevwandi Perera, Toru Nakamura, Masayuki Hashimoto, Hiroyuki Yokoyama, Chen-Mou Cheng, Kouichi Sakurai

Cryptogr. 6 ( 1 ) 3 - 3 2022.3 （ eISSN:2410-387X ）

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Publishing type：Research paper (scientific journal)

DOI： 10.3390/cryptography6010003

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A Privacy-Preserving Data Feed Scheme for Smart Contracts

WANG Hao, LIU Zhe, GE Chunpeng, SAKURAI Kouichi, SU Chunhua

IEICE Transactions on Information and Systems E105.D ( 2 ) 195 - 204 2022.2 （ ISSN:09168532 eISSN:17451361 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers

Smart contracts are becoming more and more popular in financial scenarios like medical insurance. Rather than traditional schemes, using smart contracts as a medium is a better choice for both participants, as it is fairer, more reliable, more efficient, and enables real-time payment. However, medical insurance contracts need to input the patient's condition information as the judgment logic to trigger subsequent execution. Since the blockchain is a closed network, it lacks a secure network environment for data interaction with the outside world. The Data feed aims to provide the service of the on-chain and off-chain data interaction. Existing researches on the data feed has solved the security problems on it effectively, such as Town Crier, TLS-N and they have also taken into account the privacy-preserving problems. However, these schemes cannot actually protect privacy because when the ciphertext data is executed by the contract, privacy information can still be inferred by analyzing the transaction results, since states of the contract are publicly visible. In this paper, based on zero-knowledge proof and Hawk technology, a on-and-off-chain complete smart contract data feed privacy-preserving scheme is proposed. In order to present our scheme more intuitively, we combined the medical insurance compensation case to implement it, which is called MIPDF. In our MIPDF, the patient and the insurance company are parties involved in the contract, and the hospital is the data provider of data feed. The patient's medical data is sent to the smart contract under the umbrella of the zero-knowledge proof signature scheme. The smart contract verifies the proof and calculates the insurance premium based on the judgment logic. Meanwhile, we use Hawk technology to ensure the privacy of on-chain contract execution, so that no information will be disclosed due to the result of contract execution. We give a general description of our scheme within the Universal Composability (UC) framework. We experiment and evaluate MIPDF on Ethereum for in-depth analysis. The results show that our scheme can securely and efficiently support the functions of medical insurance and achieve complete privacy-preserving.

DOI： 10.1587/transinf.2021bci0001

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Tree Parity Machine-Based Symmetric Encryption: A Hybrid Approach

Meraouche, I; Dutta, S; Tan, H; Sakurai, K

MATHEMATICS AND COMPUTING, ICMC 2022 415 61 - 73 2022 （ ISSN:2194-1009 ISBN:978-981-19-9309-1 ）

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Publisher：Springer Proceedings in Mathematics and Statistics

In a symmetric key encryption the sender and the receiver must possess the same pre-distributed key in order to encrypt or decrypt the exchanged messages. Exchanging symmetric keys is a challenging issue in cryptography. In this paper, we put forward a symmetric key encryption technique that does not require any common pre-shared “knowledge” between the parties. More specifically, we use a type of neural network called Tree Parity Machines (TPMs) which, when synchronized, enable two parties to reach a common state. The common state can be used to establish a common secret key. Our method makes use of the Tree Parity Machines to reach a common state between the parties communicating and encrypt the communications with an ElGamal-type encryption methodology. The advantage of our implementation is that the initial key exchange method is fast, lightweight and believed to become a post-quantum candidate. We have analyzed the randomness of the produced ciphertexts from our system using NIST randomness tests and the results are included in the paper. We also demonstrate security against chosen plaintext attacks.

DOI： 10.1007/978-981-19-9307-7_6

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Towards the Design of Locally Differential Private Hardware System for Edge Computing

Taguchi, K; Sakurai, K; Iida, M

2022 TENTH INTERNATIONAL SYMPOSIUM ON COMPUTING AND NETWORKING, CANDAR 186 - 191 2022 （ ISSN:2379-1888 ISBN:978-1-6654-7530-3 ）

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Publisher：Proceedings - 2022 10th International Symposium on Computing and Networking, CANDAR 2022

A challenging issue for edge computing is how to correct meaningful information from sensor data while keeping the privacy of the data and individuals. One approach is given by the recent work [Choi et al. 'Guaranteeing Local Differential Privacy on Ultra-Low-Power Systems' 2018 ACM/IEEE 45th Annual International Symposium on Computer Architecture (ISCA)]. They point out that low resolution and fixed point characteristics of Ultra-Low-Power implementations may break privacy guarantees due to the low quality of noising. For overcoming this weakness, they introduce the techniques of resampling and thresholding. They also implemented in hardware to show the proposed method achieves both low overhead and high utility while keeping local differential privacy, with sensor/IoT benchmarks. Whereas, this research show some flaw in the existing work above and improve the method. We give the case in which infinite privacy loss still occurs because of low resolution even though the width of the output distribution is restricted, which was not investigated yet by the original paper of ISCA2018. Our major contribution is to propose an improvement to avoid privacy loss from low resolution and to enhance privacy protection in this circuit. Furthermore, we report the experimental results with software simulations, which guarantees the utility of our improving method. Finally, we discuss the power and limitation of our improved method with future challenging issues.

DOI： 10.1109/CANDAR57322.2022.00033

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Decentralized and Collaborative Tracing for Group Signatures.

Maharage Nisansala Sevwandi Perera, Toru Nakamura, Masayuki Hashimoto, Hiroyuki Yokoyama, Chen-Mou Cheng, Kouichi Sakurai

AsiaCCS 1258 - 1260 2022 （ ISBN:978-1-4503-9140-5 ）

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Publishing type：Research paper (international conference proceedings) Publisher：ACM

DOI： 10.1145/3488932.3527295

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Other Link： https://dblp.uni-trier.de/db/conf/asiaccs/asiaccs2022.html#PereraNHYCS22
A Systematic Study of Bulletin Board and Its Application.

Misni Harjo Suwito, Bayu Adhi Tama, Bagus Santoso, Sabyasachi Dutta, Haowen Tan, Yoshifumi Ueshige, Kouichi Sakurai

AsiaCCS 1213 - 1215 2022 （ ISBN:978-1-4503-9140-5 ）

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Publishing type：Research paper (international conference proceedings)

DOI： 10.1145/3488932.3527280

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Other Link： https://dblp.uni-trier.de/db/conf/asiaccs/asiaccs2022.html#SuwitoTSDTUS22
On the Information-theoretic Security of Combinatorial All-or-nothing Transforms.

Yujie Gu, Sonata Akao, Navid Nasr Esfahani, Ying Miao, Kouichi Sakurai

CoRR abs/2202.10280 2022

　More details

All-or-nothing transforms (AONT) were proposed by Rivest as a message
preprocessing technique for encrypting data to protect against brute-force
attacks, and have numerous applications in cryptography and information
security. Later the unconditionally secure AONT and their combinatorial
characterization were introduced by Stinson. Informally, a combinatorial AONT
is an array with the unbiased requirements and its security properties in
general depend on the prior probability distribution on the inputs $s$-tuples.
Recently, it was shown by Esfahani and Stinson that a combinatorial AONT has
perfect security provided that all the inputs $s$-tuples are equiprobable, and
has weak security provided that all the inputs $s$-tuples are with non-zero
probability.
This paper aims to explore on the gap between perfect security and weak
security for combinatorial $(t,s,v)$-AONTs. Concretely, we consider the typical
scenario that all the $s$ inputs take values independently (but not necessarily
identically) and quantify the amount of information
$H(\mathcal{X}|\mathcal{Y})$ about any $t$ inputs $\mathcal{X}$ that is not
revealed by any $s-t$ outputs $\mathcal{Y}$. In particular, we establish the
general lower and upper bounds on $H(\mathcal{X}|\mathcal{Y})$ for
combinatorial AONTs using information-theoretic techniques, and also show that
the derived bounds can be attained in certain cases. Furthermore, the
discussions are extended for the security properties of combinatorial
asymmetric AONTs.

arXiv

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Other Link： https://dblp.uni-trier.de/db/journals/corr/corr2202.html#abs-2202-10280
Learning Multi-Party Adversarial Encryption and Its Application to Secret Sharing

Meraouche, I; Dutta, S; Mohanty, SK; Agudo, I; Sakurai, K

IEEE ACCESS 10 121329 - 121339 2022 （ ISSN:2169-3536 ）

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Publisher：IEEE Access

Neural networks based cryptography has seen a significant growth since the introduction of adversarial cryptography which makes use of Generative Adversarial Networks (GANs) to build neural networks that can learn encryption. The encryption has been proven weak at first but many follow up works have shown that the neural networks can be made to learn the One Time Pad (OTP) and produce perfectly secure ciphertexts. To the best of our knowledge, existing works only considered communications between two or three parties. In this paper, we show how multiple neural networks in an adversarial setup can remotely synchronize and establish a perfectly secure communication in the presence of different attackers eavesdropping their communication. As an application, we show how to build Secret Sharing Scheme based on this perfectly secure multi-party communication. The results show that it takes around 45,000 training steps for 4 neural networks to synchronize and reach equilibria. When reaching equilibria, all the neural networks are able to communicate between each other and the attackers are not able to break the ciphertexts exchanged between them.

DOI： 10.1109/ACCESS.2022.3223430

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Handling class Imbalance problem in Intrusion Detection System based on deep learning.

Mariama Mbow, Hiroshi Koide, Kouichi Sakurai

Int. J. Netw. Comput. 12 ( 2 ) 467 - 492 2022

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Other Link： https://dblp.uni-trier.de/db/journals/ijnc/ijnc12.html#MbowKS22
Handling class Imbalance problem in Intrusion Detection System based on deep learning

Mbow Mariama, Koide Hiroshi, Sakurai Kouichi

International Journal of Networking and Computing 12 ( 2 ) 467 - 492 2022 （ ISSN:21852839 eISSN:21852847 ）

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Language：English Publisher：IJNC Editorial Committee

Network intrusion detection system(NIDS) is the most used tool to detect malicious network activities. The NIDS has achieved in the recent years promising results for detecting known and novel attacks, with the adoption of deep learning. However, these NIDSs still have shortcomings. Most of the datasets used for NIDS are highly imbalanced, where the number of samples that belong to normal traffic is much larger than the attack traffic. The problem of imbalanced class skews the results. It limits the deep learning classifier’s performance for minority classes by misleading the classifier to be biased in favor of the majority class. To improve the detection rate for minority classes while ensuring efficiency, this study proposes a hybrid approach to handle the imbalance problem. This hybrid approach is a combination of oversampling with Synthetic Minority Over-Sampling (SMOTE) and Tomek link, an under-sampling method to reduce noise. Additionally, this study uses two deep learning models such as Long Short-Term Memory Network (LSTM) and Convolutional Neural Network (CNN) to provide a better intrusion detection system. The advantage of our proposed model is tested in NSL-KDD, CICIDS2017 datasets. In addition, we evaluate the method in the most recent intrusion detection dataset, CICIDS2018 dataset. We use 10-fold cross validation in this work to train the learning models and an independent test set for evaluation. The experimental results show that in the multi-class classification with NSLKDD dataset, the proposed model reached an overall accuracy and Fscore of 99% and 99.0.2% respectively on LSTM, an overall accuracy and Fscore of 99.70% and 99.27% respectively for CNN. And with CICIDS2017 an overall ac- curacy and Fscore of 99.65% and 98 % respectively on LSTM, an overall accuracy and Fscore of 99.85% and 98.98% respectively for CNN. In CICIDS2018 the proposed method achieved an overall detection rate and Fscore of 95% and 94% respectively.

DOI： 10.15803/ijnc.12.2_467

CiNii Research
Federated Learning with Clustering-Based Participant Selection for IoT Applications

Wang K.I.K., Ye X., Sakurai K.

Proceedings - 2022 IEEE International Conference on Big Data, Big Data 2022 6830 - 6831 2022 （ ISBN:9781665480451 ）

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Publisher：Proceedings - 2022 IEEE International Conference on Big Data, Big Data 2022

Modern Internet of Things (IoT) systems are highly complex due to its mobile, ad-hoc and geographically distributed nature. Very often, an edge-cloud infrastructure is established to offer intelligent services in modern IoT systems. However, IoT edge devices are typically resource-constrained and can not perform sophisticated machine learning algorithm on board. Data sharing with a central server is a common approach of crowdsourcing, but also brings privacy and security concerns. The emerging federated learning offers a promising pathway to achieve an accurate model through distributed machine learning while ensuring data privacy. The existing federated learning process is not tailored to the mobile and adhoc nature of IoT systems where devices are of varying data and system qualities and may not be able to participate the entire training process. Therefore, in this paper, a new federated learning framework is proposed to support asynchronous model fusion with clustering-based participant selection. The proposed framework aims to accommodate the ad-hoc nature of IoT devices, and at the same time avoiding low quality or even malicious data from its participants to ensure model convergence and performance.

DOI： 10.1109/BigData55660.2022.10020575

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Computational experimental evaluation of the time variance of cryptocurrency mining using cryptographic hash functions

Ikebe, K; Sakurai, K

PROCEEDINGS OF 2022 4TH BLOCKCHAIN AND INTERNET OF THINGS CONFERENCE, BIOTC 2022 54 - 61 2022 （ ISBN:978-1-4503-9662-2 ）

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Publisher：ACM International Conference Proceeding Series

When trading cryptocurrencies, mining is the process of searching for a solution to a computationally difficult problem. Due to the nature of the search, the time required for mining is subject to fluctuations. This is undesirable from the standpoint of security. In order to reduce the variance of mining time, we implemented the multiple concatenation mining method proposed in existing research and evaluated its performance. Although the results differ from theoretical values, the effect of small variance was confirmed.

DOI： 10.1145/3559795.3559803

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Attribute Based Tracing for Securing Group Signatures Against Centralized Authorities.

Maharage Nisansala Sevwandi Perera, Toru Nakamura, Takashi Matsunaka, Hiroyuki Yokoyama, Kouichi Sakurai

Information Security Practice and Experience - 17th International Conference(ISPEC) 13620 554 - 572 2022 （ ISSN:0302-9743 ISBN:978-3-031-21279-6 eISSN:1611-3349 ）

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Publishing type：Research paper (international conference proceedings) Publisher：Springer

DOI： 10.1007/978-3-031-21280-2_31

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Other Link： https://dblp.uni-trier.de/db/conf/ispec/ispec2022.html#PereraNMYS22
ASIA CCS '22: ACM Asia Conference on Computer and Communications Security, Nagasaki, Japan, 30 May 2022 - 3 June 2022

AsiaCCS 2022 （ ISBN:9781450391405 ）

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Publishing type：Research paper (international conference proceedings) Publisher：ACM

DOI： 10.1145/3488932

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Analysis of Variance of Searching Time for Serial Concatenation of Graph-Clique based Cryptocurrency Mining

Kei, I; Sakurai, K

2022 TENTH INTERNATIONAL SYMPOSIUM ON COMPUTING AND NETWORKING WORKSHOPS, CANDARW 380 - 383 2022 （ ISBN:978-1-6654-7532-7 ）

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Publisher：Proceedings - 2022 10th International Symposium on Computing and Networking Workshops, CANDARW 2022

Cryptocurrency involves the search for a solution to a computationally difficult problem when conducting transactions. This is called mining, and by its nature, the time required for mining can vary significantly. This is undesirable from a security perspective. Existing research has proposed mining using graph cliques and methods for linking multiple mines with the aim of reducing the variance in mining time. In this study, we evaluated and implemented the possibility of further reducing the variance of mining time by combining the existing studies. The results showed that the combination of the two methods was more effective than conventional mining and existing research to achieve small variance.

DOI： 10.1109/CANDARW57323.2022.00089

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Advances in Adversarial Attacks and Defenses in Intrusion Detection System: A Survey Reviewed

Mariama Mbow, Kouichi Sakurai, Hiroshi Koide

Communications in Computer and Information Science 1680 196 - 212 2022 （ ISSN:1865-0929 ISBN:978-981-19-7768-8 eISSN:1865-0937 ）

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Language：English Publishing type：Part of collection (book) Publisher：Springer Nature Singapore

DOI： 10.1007/978-981-19-7769-5_15

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A Survey on Privacy Preserving Synthetic Data Generation and a Discussion on a Privacy-Utility Trade-off Problem

Ghatak, D; Sakurai, K

SCIENCE OF CYBER SECURITY, SCISEC 2022 WORKSHOPS 1680 167 - 180 2022 （ ISSN:1865-0929 ISBN:978-981-19-7768-8 eISSN:1865-0937 ）

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Publisher：Communications in Computer and Information Science

Sharing microdata is a very important part of the present day world, but when they contain sensitive information, privacy to individuals needs to be guaranteed before release of data. One idea is to study the distributional properties of a data-set and generate synthetic data which has similar properties but unlike the original data comes with a privacy guarantee. In this review paper, we describe in detail, some advanced privacy guarantees that needs to be checked before release of such information. Also, we discuss some utility metrics to measure the remaining utility of released data. Very few mechanisms have been developed to ensure utility to synthetic data, provided a very strong privacy guarantee is maintained. We discuss some existing methodologies on privacy preserving synthetic data generation and discuss a privacy utility tradeoff problem.

DOI： 10.1007/978-981-19-7769-5_13

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A Survey of Polynomial Multiplication With RSA-ECC Coprocessors and Implementations of NIST PQC Round3 KEM Algorithms in Exynos2100.

Jong-Yeon Park, Yong-Hyuk Moon, Won-Il Lee, Sung-Hyun Kim, Kouichi Sakurai

IEEE Access 10 2546 - 2563 2022 （ ISSN:2169-3536 ）

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DOI： 10.1109/ACCESS.2021.3138807

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A Survey of Software Clone Detection From Security Perspective Reviewed International journal

#Haibo Zhang @Kouichi Sakurai

IEEE Access 9: 48157-48173 (2021) 2021.7

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1109/ACCESS.2021.3065872

Other Link： https://ieeexplore.ieee.org/document/9378511
Deniable Secret Handshake Protocol - Revisited

Somnath Panja, Sabyasachi Dutta, Kouichi Sakurai

33rd International Conference on Advanced Information Networking and Applications, AINA-2019 Advanced Information Networking and Applications - Proceedings of the 33rd International Conference on Advanced Information Networking and Applications AINA-2019 1266 - 1278 2020.1

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Language：English Publishing type：Research paper (other academic)

DOI： 10.1007/978-3-030-15032-7_106
Towards a lightweight detection system for cyber attacks in the IoT environment using corresponding features Reviewed

Yan Naung Soe, Yaokai Feng, Paulus Insap Santosa, Rudy Hartanto, Kouichi Sakurai

Electronics (Switzerland) 9 ( 1 ) 2020.1

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.3390/electronics9010144
Classification of Malicious Domains by Their LIFETIME

Daiji Hara, Kouichi Sakurai, Yasuo Musashi

Lecture Notes on Data Engineering and Communications Technologies 334 - 341 2020.1

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Language：English

DOI： 10.1007/978-3-030-39746-3_35
Blockchain for IoT-Based Digital Supply Chain A Survey

Haibo Zhang, Kouichi Sakurai

Lecture Notes on Data Engineering and Communications Technologies 564 - 573 2020.1

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Language：English

DOI： 10.1007/978-3-030-39746-3_57
3-Party Adversarial Cryptography

Ishak Meraouche, Sabyasachi Dutta, Kouichi Sakurai

Lecture Notes on Data Engineering and Communications Technologies 247 - 258 2020.1

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Language：English

DOI： 10.1007/978-3-030-39746-3_27
Simulation of Secure Volunteer Computing by Using Blockchain

Johjima Shota, Kosuke Kaneko, Subodh Sharma, Kouichi Sakurai

33rd International Conference on Advanced Information Networking and Applications, AINA-2019 Advanced Information Networking and Applications - Proceedings of the 33rd International Conference on Advanced Information Networking and Applications AINA-2019 883 - 894 2020.1

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DOI： 10.1007/978-3-030-15032-7_74
Implementing Lightweight IoT-IDS on Raspberry Pi Using Correlation-Based Feature Selection and Its Performance Evaluation

Yan Naung Soe, Yaokai Feng, Paulus Insap Santosa, Rudy Hartanto, Kouichi Sakurai

33rd International Conference on Advanced Information Networking and Applications, AINA-2019 Advanced Information Networking and Applications - Proceedings of the 33rd International Conference on Advanced Information Networking and Applications AINA-2019 458 - 469 2020.1

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Language：English Publishing type：Research paper (other academic)

DOI： 10.1007/978-3-030-15032-7_39
BCC'19 chairs' welcome Reviewed

Satya Lokam, Sushmita Ruj, Kouichi Sakurai

3rd ACM Workshop on Blockchains, Cryptocurrencies, and Contracts, BCC 2019, held in conjunction with the 14th ACM Asia Conference on Computer and Communications Security, AsiaCCS 2019 BCC 2019 - Proceedings of the 3rd ACM Workshop on Blockchains, Cryptocurrencies and Contracts, co-located with AsiaCCS 2019 III 2019.7

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RSA public keys with inside structure Proofs of key generation and identities for web-of-trust Reviewed

Hiroaki Anada, Takanori Yasuda, Junpei Kawamoto, Jian Weng, Kouichi Sakurai

Journal of Information Security and Applications 45 10 - 19 2019.4

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.jisa.2018.12.006
RSA public keys with inside structure Proofs of key generation and identities for web-of-trust Reviewed

Hiroaki Anada, Takanori Yasuda, Junpei Kawamoto, Jian Weng, Kouichi Sakurai

Journal of Information Security and Applications 45 10 - 19 2019.4

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.jisa.2018.12.006
Attacking convolutional neural network using differential evolution Reviewed

Jiawei Su, Danilo Vasconcellos Vargas, Kouichi Sakurai

IPSJ Transactions on Computer Vision and Applications 11 ( 1 ) 2019.2

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1186/s41074-019-0053-3
Analysis of variance of graph-clique mining for scalable proof of work

Hiroaki Anada, Tomohiro Matsushima, Chunhua Su, Weizhi Meng, Junpei Kawamoto, Samiran Bag, Kouichi Sakurai

14th International Conference on Information Security and Cryptology, Inscrypt 2018 Information Security and Cryptology - 14th International Conference, Inscrypt 2018, Revised Selected Papers 101 - 114 2019.1

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Language：English Publishing type：Research paper (other academic)

DOI： 10.1007/978-3-030-14234-6_6
Universal Rules for Fooling Deep Neural Networks based Text Classification Reviewed

Di Li, Danilo Vasconcellos Vargas, Sakurai Kouichi

IEEE Congress on Evolutionary Computation(CEC) 2221 - 2228 2019.1

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Language：Others Publishing type：Research paper (other academic)

DOI： 10.1109/CEC.2019.8790213
Attacking convolutional neural network using differential evolution Reviewed

Jiawei Su, Danilo Vasconcellos Vargas, Kouichi Sakurai

IPSJ Transactions on Computer Vision and Applications 11 ( 1 ) 1 2019

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A new design for evaluating moving target defense system

Wai Kyi Kyi Oo, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 Proceedings - 2018 6th International Symposium on Computing and Networking Workshops, CANDARW 2018 561 - 563 2018.12

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DOI： 10.1109/CANDARW.2018.00111
Tracing MIRAI malware in networked system

Yao Xu, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 Proceedings - 2018 6th International Symposium on Computing and Networking Workshops, CANDARW 2018 534 - 538 2018.12

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DOI： 10.1109/CANDARW.2018.00104
Suppressing chain size of blockchain-based information sharing for swarm robotic systems

Yuki Nishida, Kosuke Kaneko, Subodh Sharma, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 Proceedings - 2018 6th International Symposium on Computing and Networking Workshops, CANDARW 2018 524 - 528 2018.12

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DOI： 10.1109/CANDARW.2018.00102
Proof of disease A blockchain consensus protocol for accurate medical decisions and reducing the disease burden

Asoke K. Talukder, Manish Chaitanya, David Arnold, Kouichi Sakurai

4th IEEE SmartWorld, 15th IEEE International Conference on Ubiquitous Intelligence and Computing, Advanced and Trusted Computing, Scalable Computing and Communications, Cloud and Big Data Computing, Internet of People and Smart City Innovations, SmartWorld/UIC/ATC/ScalCom/CBDCom/IoP/SCI 2018 Proceedings - 2018 IEEE SmartWorld, Ubiquitous Intelligence and Computing, Advanced and Trusted Computing, Scalable Computing and Communications, Cloud and Big Data Computing, Internet of People and Smart City Innovations, SmartWorld/UIC/ATC/ScalCom/CBDCom/IoP/SCI 2018 257 - 262 2018.12

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DOI： 10.1109/SmartWorld.2018.00079
Neural cryptography based on the topology evolving neural networks

Yuetong Zhu, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 Proceedings - 2018 6th International Symposium on Computing and Networking Workshops, CANDARW 2018 472 - 478 2018.12

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DOI： 10.1109/CANDARW.2018.00091
Empirical evaluation on robustness of deep convolutional neural networks activation functions against adversarial perturbation

Jiawei Su, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 Proceedings - 2018 6th International Symposium on Computing and Networking Workshops, CANDARW 2018 223 - 227 2018.12

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DOI： 10.1109/CANDARW.2018.00049
Detecting distributed cyber attacks in SDN based on automatic thresholding

Ryousuke Komiya, Yaokai Feng, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 Proceedings - 2018 6th International Symposium on Computing and Networking Workshops, CANDARW 2018 417 - 423 2018.12

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DOI： 10.1109/CANDARW.2018.00083
A new design for evaluating moving target defense system

Wai Kyi Kyi Oo, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 Proceedings - 2018 6th International Symposium on Computing and Networking Workshops, CANDARW 2018 561 - 563 2018.12

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DOI： 10.1109/CANDARW.2018.00111
Tracing MIRAI malware in networked system

Yao Xu, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 Proceedings - 2018 6th International Symposium on Computing and Networking Workshops, CANDARW 2018 534 - 538 2018.12

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DOI： 10.1109/CANDARW.2018.00104
Suppressing chain size of blockchain-based information sharing for swarm robotic systems

Yuki Nishida, Kosuke Kaneko, Subodh Sharma, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 Proceedings - 2018 6th International Symposium on Computing and Networking Workshops, CANDARW 2018 524 - 528 2018.12

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DOI： 10.1109/CANDARW.2018.00102
Proof of disease A blockchain consensus protocol for accurate medical decisions and reducing the disease burden

Asoke K. Talukder, Manish Chaitanya, David Arnold, Kouichi Sakurai

4th IEEE SmartWorld, 15th IEEE International Conference on Ubiquitous Intelligence and Computing, Advanced and Trusted Computing, Scalable Computing and Communications, Cloud and Big Data Computing, Internet of People and Smart City Innovations, SmartWorld/UIC/ATC/ScalCom/CBDCom/IoP/SCI 2018 Proceedings - 2018 IEEE SmartWorld, Ubiquitous Intelligence and Computing, Advanced and Trusted Computing, Scalable Computing and Communications, Cloud and Big Data Computing, Internet of People and Smart City Innovations, SmartWorld/UIC/ATC/ScalCom/CBDCom/IoP/SCI 2018 257 - 262 2018.12

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DOI： 10.1109/SmartWorld.2018.00079
Neural cryptography based on the topology evolving neural networks

Yuetong Zhu, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 Proceedings - 2018 6th International Symposium on Computing and Networking Workshops, CANDARW 2018 472 - 478 2018.12

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DOI： 10.1109/CANDARW.2018.00091
Empirical evaluation on robustness of deep convolutional neural networks activation functions against adversarial perturbation

Jiawei Su, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 Proceedings - 2018 6th International Symposium on Computing and Networking Workshops, CANDARW 2018 223 - 227 2018.12

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DOI： 10.1109/CANDARW.2018.00049
Detecting distributed cyber attacks in SDN based on automatic thresholding

Ryousuke Komiya, Yaokai Feng, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 Proceedings - 2018 6th International Symposium on Computing and Networking Workshops, CANDARW 2018 417 - 423 2018.12

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DOI： 10.1109/CANDARW.2018.00083
Feature selection for machine learning-based early detection of distributed cyber attacks

Yaokai Feng, Hitoshi Akiyama, Liang Lu, Kouichi Sakurai

16th IEEE International Conference on Dependable, Autonomic and Secure Computing, IEEE 16th International Conference on Pervasive Intelligence and Computing, IEEE 4th International Conference on Big Data Intelligence and Computing and IEEE 3rd Cyber Science and Technology Congress, DASC-PICom-DataCom-CyberSciTec 2018 Proceedings - IEEE 16th International Conference on Dependable, Autonomic and Secure Computing, IEEE 16th International Conference on Pervasive Intelligence and Computing, IEEE 4th International Conference on Big Data Intelligence and Computing and IEEE 3rd Cyber Science and Technology Congress, DASC-PICom-DataCom-CyberSciTec 2018 181 - 186 2018.10

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DOI： 10.1109/DASC/PiCom/DataCom/CyberSciTec.2018.00040
Feature selection for machine learning-based early detection of distributed cyber attacks

Yaokai Feng, Hitoshi Akiyama, Liang Lu, Kouichi Sakurai

16th IEEE International Conference on Dependable, Autonomic and Secure Computing, IEEE 16th International Conference on Pervasive Intelligence and Computing, IEEE 4th International Conference on Big Data Intelligence and Computing and IEEE 3rd Cyber Science and Technology Congress, DASC-PICom-DataCom-CyberSciTec 2018 Proceedings - IEEE 16th International Conference on Dependable, Autonomic and Secure Computing, IEEE 16th International Conference on Pervasive Intelligence and Computing, IEEE 4th International Conference on Big Data Intelligence and Computing and IEEE 3rd Cyber Science and Technology Congress, DASC-PICom-DataCom-CyberSciTec 2018 181 - 186 2018.10

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DOI： 10.1109/DASC/PiCom/DataCom/CyberSciTec.2018.00040
Active attack against oblivious RAM

Yuto Nakano, Seira Hidano, Shinsaku Kiyomoto, Kouichi Sakurai

32nd IEEE International Conference on Advanced Information Networking and Applications, AINA 2018 Proceedings - 32nd IEEE International Conference on Advanced Information Networking and Applications, AINA 2018 744 - 751 2018.8

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DOI： 10.1109/AINA.2018.00112
Lightweight Classification of IoT Malware Based on Image Recognition

Jiawei Su, Danilo Vasconcellos Vargas, Sanjiva Prasad, Sgandurra Daniele, Yaokai Feng, Kouichi Sakurai

42nd IEEE Computer Software and Applications Conference, COMPSAC 2018 Proceedings - 2018 IEEE 42nd Annual Computer Software and Applications Conference, COMPSAC 2018 664 - 669 2018.6

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DOI： 10.1109/COMPSAC.2018.10315
Light Weight Write Mechanism for Cloud Data Reviewed

Mosarrat Jahan, Mohsen Rezvani, Qianrui Zhao, Partha Sarathi Roy, Kouichi Sakurai, Aruna Seneviratne, Sanjay Jha

IEEE Transactions on Parallel and Distributed Systems 29 ( 5 ) 1131 - 1146 2018.5

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DOI： 10.1109/TPDS.2017.2782253
Light Weight Write Mechanism for Cloud Data Reviewed

Mosarrat Jahan, Mohsen Rezvani, Qianrui Zhao, Partha Sarathi Roy, Kouichi Sakurai, Aruna Seneviratne, Sanjay Jha

IEEE Transactions on Parallel and Distributed Systems 29 ( 5 ) 1131 - 1146 2018.5

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DOI： 10.1109/TPDS.2017.2782253
BCC'18 chairs' welcome Reviewed

Satya Lokam, Sushmita Ruj, Kouichi Sakurai

2nd ACM Workshop on Blockchains, Cryptocurrencies, and Contracts, BCC 2018 BCC 2018 - Proceedings of the 2nd ACM Workshop on Blockchains, Cryptocurrencies, and Contracts, Co-located with ASIA CCS 2018 iii 2018.5

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Light Weight Write Mechanism for Cloud Data Reviewed

Mosarrat Jahan, Mohsen Rezvani, Qianrui Zhao, Partha Sarathi Roy, Kouichi Sakurai, Aruna Seneviratne, Sanjay Jha

IEEE Transactions on Parallel and Distributed Systems 29 ( 5 ) 1131 - 1146 2018.5

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DOI： 10.1109/TPDS.2017.2782253
BCC'18 chairs' welcome Reviewed

Satya Lokam, Sushmita Ruj, Kouichi Sakurai

2nd ACM Workshop on Blockchains, Cryptocurrencies, and Contracts, BCC 2018 BCC 2018 - Proceedings of the 2nd ACM Workshop on Blockchains, Cryptocurrencies, and Contracts, Co-located with ASIA CCS 2018 iii 2018.5

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Effectively Protect Your Privacy Enabling Flexible Privacy Control on Web Tracking

Shiqian Yu, Danilo Vasconcellos Vargas, Kouichi Sakurai

5th International Symposium on Computing and Networking, CANDAR 2017 Proceedings - 2017 5th International Symposium on Computing and Networking, CANDAR 2017 533 - 536 2018.4

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DOI： 10.1109/CANDAR.2017.26
Attacking Convolutional Neural Network using Differential Evolution Reviewed

Jiawei Su, Danilo Vasconcellos Vargas, Kouichi Sakurai

CoRR abs/1804.07062 2018.4

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Packet in Message Based DDoS Attack Detection in SDN Network Using OpenFlow

Xiang You, Yaokai Feng, Kouichi Sakurai

5th International Symposium on Computing and Networking, CANDAR 2017 Proceedings - 2017 5th International Symposium on Computing and Networking, CANDAR 2017 2018-January 522 - 528 2018.4

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DOI： 10.1109/CANDAR.2017.93
Effectively Protect Your Privacy Enabling Flexible Privacy Control on Web Tracking

Shiqian Yu, Danilo Vasconcellos Vargas, Kouichi Sakurai

5th International Symposium on Computing and Networking, CANDAR 2017 Proceedings - 2017 5th International Symposium on Computing and Networking, CANDAR 2017 533 - 536 2018.4

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DOI： 10.1109/CANDAR.2017.26
Packet in Message Based DDoS Attack Detection in SDN Network Using OpenFlow

Xiang You, Yaokai Feng, Kouichi Sakurai

5th International Symposium on Computing and Networking, CANDAR 2017 Proceedings - 2017 5th International Symposium on Computing and Networking, CANDAR 2017 2018-January 522 - 528 2018.4

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DOI： 10.1109/CANDAR.2017.93
Lightweight Classification of IoT Malware based on Image Recognition Reviewed

Jiawei Su, Danilo Vasconcellos Vargas, Sanjiva Prasad, Daniele Sgandurra, Yaokai Feng, Kouichi Sakurai

Proceedings - International Computer Software and Applications Conference 2 664 - 669 2018.2

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DOI： 10.1109/COMPSAC.2018.10315
Preface Reviewed

Debdas Ghosh, Debasis Giri, R. N. Mohapatra, Ekrem Savas, Kouichi Sakurai, L. P. Singh

4th International Conference on Mathematics and Computing, ICMC 2018 Communications in Computer and Information Science 834 IX - X 2018.1

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Light weight and fine-grained access mechanism for secure access to outsourced data* Reviewed

Mosarrat Jahan, Suranga Seneviratne, Partha Sarathi Roy, Kouichi Sakurai, Aruna Seneviratne, Sanjay Jha

Concurrency Computation 2018.1

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DOI： 10.1002/cpe.4736
A New Design for Evaluating Moving Target Defense System

Wai Kyi Kyi Oo, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

2018 Sixth International Symposium on Computing and Networking Workshops (CANDARW) 561 - 563 2018

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Tracing MIRAI Malware in Networked System

Yao Xu, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

2018 Sixth International Symposium on Computing and Networking Workshops (CANDARW) 534 - 538 2018

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Neural Cryptography Based on the Topology Evolving Neural Networks

Yuetong Zhu, Danilo Vasconcellos Vargas, Kouichi Sakurai

2018 Sixth International Symposium on Computing and Networking Workshops (CANDARW) 472 - 478 2018

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Lightweight classification of IoT malware based on image recognition

Jiawei Su, Vargas Danilo Vasconcellos, Sanjiva Prasad, Sgandurra Daniele, Yaokai Feng, Kouichi Sakurai

2018 IEEE 42nd Annual Computer Software and Applications Conference (COMPSAC) 2 664 - 669 2018

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Empirical Evaluation on Robustness of Deep Convolutional Neural Networks Activation Functions Against Adversarial Perturbation

Jiawei Su, Danilo Vasconcellos Vargas, Kouichi Sakurai

2018 Sixth International Symposium on Computing and Networking Workshops (CANDARW) 223 - 227 2018

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A New Design for Evaluating Moving Target Defense System

Wai Kyi Kyi Oo, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

2018 Sixth International Symposium on Computing and Networking Workshops (CANDARW) 561 - 563 2018

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Tracing MIRAI Malware in Networked System

Yao Xu, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

2018 Sixth International Symposium on Computing and Networking Workshops (CANDARW) 534 - 538 2018

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Neural Cryptography Based on the Topology Evolving Neural Networks

Yuetong Zhu, Danilo Vasconcellos Vargas, Kouichi Sakurai

2018 Sixth International Symposium on Computing and Networking Workshops (CANDARW) 472 - 478 2018

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Lightweight classification of IoT malware based on image recognition

Jiawei Su, Vargas Danilo Vasconcellos, Sanjiva Prasad, Sgandurra Daniele, Yaokai Feng, Kouichi Sakurai

2018 IEEE 42nd Annual Computer Software and Applications Conference (COMPSAC) 2 664 - 669 2018

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Empirical Evaluation on Robustness of Deep Convolutional Neural Networks Activation Functions Against Adversarial Perturbation

Jiawei Su, Danilo Vasconcellos Vargas, Kouichi Sakurai

2018 Sixth International Symposium on Computing and Networking Workshops (CANDARW) 223 - 227 2018

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Secure combinatorial key predistribution scheme for sensor networks by regulating frequencies magneto optic sensors Reviewed

Pinaki Sarkar, Morshed Uddin Chowdhury, Kouichi Sakurai

Concurrency Computation Practice and Experience 29 ( 23 ) 2017.12

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DOI： 10.1002/cpe.4017
Secure combinatorial key predistribution scheme for sensor networks by regulating frequencies: magneto optic sensors Reviewed

Pinaki Sarkar, Morshed Uddin Chowdhury, Kouichi Sakurai

CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE 29 ( 23 ) 2017.12

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DOI： 10.1002/cpe.4017
Cross-group secret sharing scheme for secure usage of cloud storage over different providers and regions Reviewed

Hiroaki Anada, Junpei Kawamoto, Chenyutao Ke, Kirill Morozov, Kouichi Sakurai

Journal of Supercomputing 73 ( 10 ) 4275 - 4301 2017.10

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DOI： 10.1007/s11227-017-2009-7
One pixel attack for fooling deep neural networks Reviewed

Jiawei Su, Danilo Vasconcellos Vargas, Sakurai Kouichi

IEEE Trans. Evol. Comput. 23 ( 5 ) 828 - 841 2017.10

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DOI： 10.1109/TEVC.2019.2890858
Cross-group secret sharing scheme for secure usage of cloud storage over different providers and regions Reviewed

Hiroaki Anada, Junpei Kawamoto, Chenyutao Ke, Kirill Morozov, Kouichi Sakurai

JOURNAL OF SUPERCOMPUTING 73 ( 10 ) 4275 - 4301 2017.10

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DOI： 10.1007/s11227-017-2009-7
A new security middleware architecture based on fog computing and cloud to support IoT constrained devices Reviewed

Wissam Razouk, Daniele Sgandurra, Kouichi Sakurai

ACM International Conference Proceeding Series 2017.10

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DOI： 10.1145/3109761.3158413
Secure and light weight fine-grained access mechanism for outsourced data

Mosarrat Jahan, Partha Sarathi Roy, Kouichi Sakurai, Aruna Seneviratne, Sanjay Jha

16th IEEE International Conference on Trust, Security and Privacy in Computing and Communications, 11th IEEE International Conference on Big Data Science and Engineering and 14th IEEE International Conference on Embedded Software and Systems, Trustcom/BigDataSE/ICESS 2017 Proceedings - 16th IEEE International Conference on Trust, Security and Privacy in Computing and Communications, 11th IEEE International Conference on Big Data Science and Engineering and 14th IEEE International Conference on Embedded Software and Systems, Trustcom/BigDataSE/ICESS 2017 201 - 209 2017.9

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DOI： 10.1109/Trustcom/BigDataSE/ICESS.2017.238
Bitcoin Block Withholding Attack Analysis and Mitigation Reviewed

Samiran Bag, Sushmita Ruj, Kouichi Sakurai

IEEE Transactions on Information Forensics and Security 12 ( 8 ) 1967 - 1978 2017.8

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DOI： 10.1109/TIFS.2016.2623588
Bitcoin Block Withholding Attack: Analysis and Mitigation Reviewed

Samiran Bag, Sushmita Ruj, Kouichi Sakurai

IEEE Transactions on Information Forensics and Security 12 ( 8 ) 1967 - 1978 2017.8

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DOI： 10.1109/TIFS.2016.2623588
Host independent and distributed detection system of the network attack by using OpenFlow. ICOIN 2017: 236-241 Reviewed International journal

Ryosuke MIYAZAKI, Junpei Kawamoto, Shinichi MATSUMOTO, Kouichi Sakurai

2017 International Conference on Information Networking (ICOIN) 2017.6

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DOI： DOI: 10.1109/ICOIN.2017.7899511

Other Link： http://ieeexplore.ieee.org/document/7899511/authors
BCC'17 chairs' Welcome Reviewed

Satya Lokam, Sushmita Ruj, Kouichi Sakurai

BCC 2017 - Proceedings of the ACM Workshop on Blockchain, Cryptocurrencies and Contracts, co-located with ASIA CCS 2017 iii 2017.4

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Host independent and distributed detection system of the network attack by using OpenFlow

Ryosuke Miyazaki, Junpei Kawamoto, Shinichi Matsumoto, Kouichi Sakurai

31st International Conference on Information Networking, ICOIN 2017 31st International Conference on Information Networking, ICOIN 2017 236 - 241 2017.4

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DOI： 10.1109/ICOIN.2017.7899511
Comments and improvements of 'HOTA Handover optimized ticket-based authentication in network-based mobility management'

Mojtaba Alizadeh, Mohammad Hessam Tadayon, Kouichi Sakurai, Sabariah Baharun, Hiroaki Anada, Mazdak Zamani, Akram Zeki, Shehzad Ashraf Chaudhry, Muhammad Khurram Khan

20th Conference on Innovations in Clouds, Internet and Networks, ICIN 2017 Proceedings of the 2017 20th Conference on Innovations in Clouds, Internet and Networks, ICIN 2017 112 - 116 2017.4

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DOI： 10.1109/ICIN.2017.7899399
A traceable signcryption scheme for secure sharing of data in cloud storage

Rohit Ahuja, Sraban Kumar Mohanty, Kouichi Sakurai

16th IEEE International Conference on Computer and Information Technology, CIT 2016 Proceedings - 2016 16th IEEE International Conference on Computer and Information Technology, CIT 2016, 2016 6th International Symposium on Cloud and Service Computing, IEEE SC2 2016 and 2016 International Symposium on Security and Privacy in Social Networks and Big Data, SocialSec 2016 524 - 531 2017.3

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DOI： 10.1109/CIT.2016.52
A Brief Review on Anomaly Detection and its Applications to Cybersecurity (情報通信システムセキュリティ)

116 ( 522 ) 37 - 42 2017.3

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A behavior-based online engine for detecting distributed cyber-attacks

Yaokai Feng, Yoshiaki Hori, Kouichi Sakurai

17th International Workshop on Information Security Applications, WISA 2016 Information Security Applications - 17th International Workshop, WISA 2016, Revised Selected Papers 10144 LNCS 79 - 89 2017.1

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DOI： 10.1007/978-3-319-56549-1_7
A scalable attribute-set-based access control with both sharing and full-fledged delegation of access privileges in cloud computing Reviewed

Rohit Ahuja, Sraban Kumar Mohanty, Kouichi Sakurai

COMPUTERS & ELECTRICAL ENGINEERING 57 241 - 256 2017.1

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DOI： 10.1016/j.compeleceng.2016.11.028
SQL injection attack detection method using expectation criterion

Linghuan Xiao, Shinichi Matsumoto, Tomohisa Ishikawa, Kouichi Sakurai

4th International Symposium on Computing and Networking, CANDAR 2016 Proceedings - 2016 4th International Symposium on Computing and Networking, CANDAR 2016 649 - 654 2017.1

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DOI： 10.1109/CANDAR.2016.74
Parameter manipulation attack prevention and detection by using web application deception proxy

Tomohisa Ishikawa, Kouichi Sakurai

11th International Conference on Ubiquitous Information Management and Communication, IMCOM 2017 Proceedings of the 11th International Conference on Ubiquitous Information Management and Communication, IMCOM 2017 2017.1

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DOI： 10.1145/3022227.3022300
On unconditionally binding code-based commitment schemes

Kirill Morozov, Partha Sarathi Roy, Kouichi Sakurai

11th International Conference on Ubiquitous Information Management and Communication, IMCOM 2017 Proceedings of the 11th International Conference on Ubiquitous Information Management and Communication, IMCOM 2017 2017.1

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DOI： 10.1145/3022227.3022327
Improving the accuracy of signature authentication using the eight principles of yong

Taku Nishigori, Junpei Kawamoto, Kouichi Sakurai

11th International Conference on Ubiquitous Information Management and Communication, IMCOM 2017 Proceedings of the 11th International Conference on Ubiquitous Information Management and Communication, IMCOM 2017 2017.1

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DOI： 10.1145/3022227.3022258
Evasion attacks against statistical code obfuscation detectors

Jiawei Su, Danilo Vasconcellos Vargas, Kouichi Sakurai

12th International Workshop on Security, IWSEC 2017 Advances in Information and Computer Security - 12th International Workshop on Security, IWSEC 2017, Proceedings 10418 LNCS 121 - 137 2017.1

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DOI： 10.1007/978-3-319-64200-0_8
C&C session detection using random forest

Liang Lu, Yaokai Feng, Kouichi Sakurai

11th International Conference on Ubiquitous Information Management and Communication, IMCOM 2017 Proceedings of the 11th International Conference on Ubiquitous Information Management and Communication, IMCOM 2017 2017.1

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DOI： 10.1145/3022227.3022260
A scalable attribute-set-based access control with both sharing and full-fledged delegation of access privileges in cloud computing Reviewed

Rohit Ahuja, Sraban Kumar Mohanty, Kouichi Sakurai

Computers and Electrical Engineering 57 241 - 256 2017.1

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DOI： 10.1016/j.compeleceng.2016.11.028
A proposal of Event Study Methodology with Twitter Sentimental Analysis for risk management

Tomohisa Ishikawa, Kouichi Sakurai

11th International Conference on Ubiquitous Information Management and Communication, IMCOM 2017 Proceedings of the 11th International Conference on Ubiquitous Information Management and Communication, IMCOM 2017 2017.1

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DOI： 10.1145/3022227.3022240
A detection system for distributed DoS attacks based on automatic extraction of normal mode and its performance evaluation

Yaokai Feng, Yoshiaki Hori, Kouichi Sakurai

10th International Conference on Security, Privacy and Anonymity in Computation, Communication and Storage, SpaCCS 2017 Security, Privacy, and Anonymity in Computation, Communication, and Storage - 10th International Conference, SpaCCS 2017, Proceedings 461 - 473 2017.1

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DOI： 10.1007/978-3-319-72389-1_37
On the robustness of visual cryptographic schemes

Sabyasachi Dutta, Partha Sarathi Roy, Avishek Adhikari, Kouichi Sakurai

15th International Workshop on Digital-Forensics and Watermarking, IWDW 2016 Digital Forensics and Watermarking - 15th International Workshop, IWDW 2016, Revised Selected Papers 10082 LNCS 251 - 262 2017

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DOI： 10.1007/978-3-319-53465_719
A Brief Review on Anomaly Detection and its Applications to Cybersecurity (\情\報\通\信\シ\ス\テ\ム\セ\キ\ュ\リ\テ\

\電\子\情\報\通\信\学\会\技\術\研\究\報\ IEICE technical report: \信\学\技\報 116 ( 522 ) 37 - 42 2017

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A Machine Learning Based Approach for Detecting DRDoS Attacks and Its Performance Evaluation

Yuxuan Gao, Yaokai Feng, Junpei Kawamoto, Kouichi Sakurai

11th Asia Joint Conference on Information Security, AsiaJCIS 2016 Proceedings - 11th Asia Joint Conference on Information Security, AsiaJCIS 2016 80 - 86 2016.12

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DOI： 10.1109/AsiaJCIS.2016.24
An Identity Preserving Access Control Scheme with Flexible System Privilege Revocation in Cloud Computing

Rohit Ahuja, Sraban Kumar Mohanty, Kouichi Sakurai

11th Asia Joint Conference on Information Security, AsiaJCIS 2016 Proceedings - 11th Asia Joint Conference on Information Security, AsiaJCIS 2016 39 - 47 2016.12

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DOI： 10.1109/AsiaJCIS.2016.23
A proposal for cyber-attack trace-back using packet marking and logging

Pengfei Li, Yaokai Feng, Junpei Kawamoto, Kouichi Sakurai

10th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2016 Proceedings - 2016 10th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2016 603 - 607 2016.12

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DOI： 10.1109/IMIS.2016.89
A behavior-based method for detecting DNS amplification attacks

Longzhu Cai, Yaokai Feng, Junpei Kawamoto, Kouichi Sakurai

10th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2016 Proceedings - 2016 10th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2016 608 - 613 2016.12

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DOI： 10.1109/IMIS.2016.88
Cyberbullying detection using parent-child relationship between comments

Ziyi Li, Junpei Kawamoto, Yaokai Feng, Kouichi Sakurai

18th International Conference on Information Integration and Web-Based Applications and Services, iiWAS 2016 18th International Conference on Information Integration and Web-Based Applications and Services, iiWAS 2016 - Proceedings Part F126325 325 - 334 2016.11

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DOI： 10.1145/3011141.3011182
Cyberbullying detection using parent-child relationship between comments Reviewed

Ziyi Li, Junpei Kawamoto, Yaokai Feng, Kouichi Sakurai

ACM International Conference Proceeding Series 325 - 334 2016.11

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DOI： 10.1145/3011141.3011182
Character-based symmetric searchable encryption and its implementation and experiment on mobile devices Reviewed

Takanori Suga, Takashi Nishide, Kouichi Sakurai

Security and Communication Networks 9 ( 12 ) 1717 - 1725 2016.8

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DOI： 10.1002/sec.876
Character-based symmetric searchable encryption and its implementation and experiment on mobile devices Reviewed

Takanori Suga, Takashi Nishide, Kouichi Sakurai

Security and Communication Networks 9 ( 12 ) 1717 - 1725 2016.8

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DOI： 10.1002/sec.876
Analysis of "receipt-freeness" and "coercion-resistance" in biometric authentication protocols

Yoshifumi Ueshige, Kouichi Sakurai

30th IEEE International Conference on Advanced Information Networking and Applications, AINA 2016 Proceedings - IEEE 30th International Conference on Advanced Information Networking and Applications, IEEE AINA 2016 2016-May 769 - 775 2016.5

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DOI： 10.1109/AINA.2016.97
Message from the STPA 2016 Workshop Organizers Reviewed

Kouichi Sakurai, Amiya Nayak, Sushmita Ruj, Haojin Zhu, Arindam Pal

Proceedings - IEEE 30th International Conference on Advanced Information Networking and Applications Workshops, WAINA 2016 lxviii 2016.5

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DOI： 10.1109/WAINA.2016.215
A multivariate encryption scheme with Rainbow Reviewed

Takanori Yasuda, Kouichi Sakurai

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 9543 236 - 251 2016.3

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DOI： 10.1007/978-3-319-29814-6_19
Evaluation of Matching Accuracy of Template Matching Using a Steganography Algorithm

Hirokazu Ishizuka, Kouichi Sakurai, Isao Echizen, Keiichi Iwamura

3rd International Symposium on Computing and Networking, CANDAR 2015 Proceedings - 2015 3rd International Symposium on Computing and Networking, CANDAR 2015 457 - 462 2016.3

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DOI： 10.1109/CANDAR.2015.68
Constructing Pairing-Friendly Elliptic Curves Using Global Number Fields

Takanori Yasuda, Tsuyoshi Takagi, Kouichi Sakurai

3rd International Symposium on Computing and Networking, CANDAR 2015 Proceedings - 2015 3rd International Symposium on Computing and Networking, CANDAR 2015 477 - 483 2016.3

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DOI： 10.1109/CANDAR.2015.28
A multivariate encryption scheme with Rainbow Reviewed

Takanori Yasuda, Kouichi Sakurai

Lecture Notes in Computer Science 9543 236 - 251 2016.3

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DOI： 10.1007/978-3-319-29814-6_19
Authentication in mobile cloud computing A survey Reviewed

Mojtaba Alizadeh, Saeid Abolfazli, Mazdak Zamani, Sabariah Baaaharun, Kouichi Sakurai

Journal of Network and Computer Applications 61 59 - 80 2016.2

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DOI： 10.1016/j.jnca.2015.10.005
Authentication in mobile cloud computing: A survey. 59-80 Reviewed International journal

Mojtaba Alizadeh, Saeid Abolfazli, Mazdak Zamani, Sabariah Baharun, Kouichi Sakurai

Journal of Network and Computer Applications 59 - 80 2016.2

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DOI： https://doi.org/10.1016/j.jnca.2015.10.005

Other Link： http://www.sciencedirect.com/science/article/pii/S1084804515002258
Retricoin: Bitcoin based on compact proofs of retrievability Reviewed

Binanda Sengupta, Samiran Bag, Kouichi Sakurai, Sushmita Ruj

ACM International Conference Proceeding Series 04-07- 2016.1

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DOI： 10.1145/2833312.2833317
Cross-group secret sharing for secure cloud storage service Reviewed

Chenyutao Ke, Hiroaki Anada, Junpei Kawamoto, Kirill Morozov, Kouichi Sakurai

ACM IMCOM 2016: Proceedings of the 10th International Conference on Ubiquitous Information Management and Communication 2016.1

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DOI： 10.1145/2857546.2857610
A study of security management with cyber insurance Reviewed

Tomohisa Ishikawa, Kouichi Sakurai

ACM IMCOM 2016: Proceedings of the 10th International Conference on Ubiquitous Information Management and Communication 2016.1

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DOI： 10.1145/2857546.2857615
Yet another note on block withholding attack on bitcoin mining pools

Samiran Bag, Kouichi Sakurai

19th Annual International Conference on Information Security, ISC 2016 Information Security - 19th International Conference, ISC 2016, Proceedings 9866 LNCS 167 - 180 2016.1

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DOI： 10.1007/978-3-319-45871-7_11
Retricoin Bitcoin based on compact proofs of retrievability

Binanda Sengupta, Samiran Bag, Kouichi Sakurai, Sushmita Ruj

17th International Conference on Distributed Computing and Networking, ICDCN 2016 Proceedings of the 17th International Conference on Distributed Computing and Networking, ICDCN 2016 04-07-January-2016 2016.1

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DOI： 10.1145/2833312.2833317
On the application of clique problem for proof-of-work in cryptocurrencies

Samiran Bag, Sushmita Ruj, Kouichi Sakurai

11th International Conference on Information Security and Cryptology, Inscrypt 2015 Information Security and Cryptology - 11th International Conference, Inscrypt 2015, Revised Selected Papers 260 - 279 2016.1

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DOI： 10.1007/978-3-319-38898-4_16
Expressive rating scheme by signatures with predications on ratees

Hiroaki Anada, Sushmita Ruj, Kouichi Sakurai

10th International Conference on Network and System Security, NSS 2016 Network and System Security - 10th International Conference, NSS 2016, Proceedings 9955 LNCS 363 - 379 2016.1

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DOI： 10.1007/978-3-319-46298-1_24
Evaluation of gamma ray durability of RF tag and application to the radiation environment

Nobuyuki Teraura, Kunio Ito, Daisuke Kobayashi, Kouichi Sakurai

IEEE International Conference on RFID Technology and Applications, RFID-TA 2015 2015 IEEE International Conference on RFID Technology and Applications, RFID-TA 2015 147 - 152 2016.1

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DOI： 10.1109/RFID-TA.2015.7379809
Efficient threshold secret sharing schemes secure against rushing cheaters

Avishek Adhikari, Kirill Morozov, Satoshi Obana, Partha Sarathi Roy, Kouichi Sakurai, Rui Xu

9th International Conference on Information-Theoretic Security, ICITS 2016 Information Theoretic Security - 9th International Conference, ICITS 2016, Revised Selected Papers 10015 LNCS 3 - 23 2016.1

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DOI： 10.1007/978-3-319-49175-2_1
Cross-group secret sharing for secure cloud storage service

Chenyutao Ke, Hiroaki Anada, Junpei Kawamoto, Kirill Morozov, Kouichi Sakurai

10th International Conference on Ubiquitous Information Management and Communication, IMCOM 2016 ACM IMCOM 2016 Proceedings of the 10th International Conference on Ubiquitous Information Management and Communication 2016.1

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DOI： 10.1145/2857546.2857610
Computational soundness of uniformity properties for multi-party computation based on LSSS

Hui Zhao, Kouichi Sakurai

7th International Conference on the Theory, Technologies and Applications of Trusted Systems, INTRUST 2015 Trusted Systems - 7th International Conference, INTRUST 2015, Revised Selected Papers 99 - 113 2016.1

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DOI： 10.1007/978-3-319-31550-8_7
CCA-secure keyed-fully homomorphic encryption

Junzuo Lai, Robert H. Deng, Changshe Ma, Kouichi Sakurai, Jian Weng

19th IACR International Conference on Practice and Theory in Public-Key Cryptography, PKC 2016 Public-Key Cryptography - PKC 2016 - 19th IACR International Conference on Practice and Theory in Public-Key Cryptography, Proceedings 70 - 98 2016.1

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DOI： 10.1007/978-3-662-49384-7_4
Attribute-based two-tier signatures Definition and construction

Hiroaki Anada, Seiko Arita, Kouichi Sakurai

18th International Conference on Information Security and Cryptology, ICISC 2015 Information Security and Cryptology - ICISC 2015 - 18th International Conference, Revised Selected Papers 9558 36 - 49 2016.1

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DOI： 10.1007/978-3-319-30840-1_3
Application of NTRU using group rings to partial decryption technique

Takanori Yasuda, Hiroaki Anada, Kouichi Sakurai

7th International Conference on the Theory, Technologies and Applications of Trusted Systems, INTRUST 2015 Trusted Systems - 7th International Conference, INTRUST 2015, Revised Selected Papers 9565 203 - 213 2016.1

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DOI： 10.1007/978-3-319-31550-8_13
An analysis of IT assessment security maturity in higher education institution

Misni Harjo Suwito, Shinchi Matsumoto, Junpei Kawamoto, Dieter Gollmann, Kouichi Sakurai

International Conference on Information Science and Applications, ICISA 2016 Information Science and Applications, ICISA 2016 376 701 - 713 2016.1

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DOI： 10.1007/978-981-10-0557-2_69
A study of security management with cyber insurance

Tomohisa Ishikawa, Kouichi Sakurai

10th International Conference on Ubiquitous Information Management and Communication, IMCOM 2016 ACM IMCOM 2016: Proceedings of the 10th International Conference on Ubiquitous Information Management and Communication 2016.1

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DOI： 10.1145/2857546.2857615
Cross-group Secret Sharing for Secure Cloud Storage Service Reviewed International journal

Chenyutao Ke, Hiroaki Anada, Junpei Kawamoto, Kirill MOROZOV, Kouichi Sakurai

ACM IMCOM '16, January 04-06, 2016, Danang, Viet Nam 2016.1

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DOI： DOI: http://dx.doi.org/10.1145/2857546.2857610
Erratum Cryptanalysis and improvement of "A secure password authentication mechanism for seamless handover in proxy mobile IPv6 networks" (PLoS ONE (2015) 10:11 (e0142716) DOI:10.1371/journal.pone.0142716) Reviewed

Mojtaba Alizadeh, Mazdak Zamani, Sabariah Baharun, Azizah Abdul Manaf, Kouichi Sakurai, Hiroaki Anada, Hassan Keshavarz, Shehzad Ashraf Chaudhry, Muhammad Khurram Khan

PLoS One 10 ( 12 ) 2015.12

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DOI： 10.1371/journal.pone.0145975
Cryptanalysis and Improvement of "A Secure Password Authentication Mechanism for Seamless Handover in Proxy Mobile IPv6 Networks" Reviewed

Mojtaba Alizadeh, Mazdak Zamani, Sabariah Baharun, Azizah Abdul Manaf, Kouichi Sakurai, Hiroki Anada, Hassan Keshavarz, Shehzad Ashraf Chaudhry, Muhammad Khurram Khan

PLOS ONE 10 ( 11 ) 2015.11

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DOI： 10.1371/journal.pone.0142716
Cryptanalysis and improvement of "a secure password authentication mechanism for seamless handover in proxy mobile IPv6 networks" Reviewed

Mojtaba Alizadeh, Mazdak Zamani, Sabariah Baharun, Azizah Abdul Manaf, Kouichi Sakurai, Hiroki Anada, Hassan Keshavarz, Shehzad Ashraf Chaudhry, Muhammad Khurram Khan

PLoS One 10 ( 11 ) 2015.11

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DOI： 10.1371/journal.pone.0142716
A note on the security of KHL scheme Reviewed

Jian Weng, Yunlei Zhao, Robert H. Deng, Shengli Liu, Yanjiang Yang, Kouichi Sakurai

Theoretical Computer Science 602 1 - 6 2015.10

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DOI： 10.1016/j.tcs.2015.07.051
A multivariate quadratic challenge toward post-quantum generation cryptography Reviewed

Takanori Yasuda, Xavier Dahan, Yun Ju Huang, Tsuyoshi Takagi, Kouichi Sakurai

ACM Communications in Computer Algebra 49 ( 3 ) 105 - 107 2015.9

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DOI： 10.1145/2850449.2850462
Proposal of multi-value cell structure for high-density two-dimensional codes and evaluation of readability using smartphones Reviewed

Nobuyuki Teraura, Kouichi Sakurai

2015 7th International Conference on New Technologies, Mobility and Security - Proceedings of NTMS 2015 Conference and Workshops 2015.9

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DOI： 10.1109/NTMS.2015.7266514
A multivariate quadratic challenge toward post-quantum generation cryptography Reviewed

Takanori Yasuda, Xavier Dahan, Yun-Ju Huang, Tsuyoshi Takagi, Kouichi Sakurai

ACM Communications in Computer Algebra 49 ( 3 ) 105 - 107 2015.9

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DOI： 10.1145/2850449.2850462
Proposal of multi-value cell structure for high-density two-dimensional codes and evaluation of readability using smartphones

Nobuyuki Teraura, Kouichi Sakurai

7th International Conference on New Technologies, Mobility and Security, NTMS 2015 2015 7th International Conference on New Technologies, Mobility and Security - Proceedings of NTMS 2015 Conference and Workshops 2015.9

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DOI： 10.1109/NTMS.2015.7266514
Detection of illegal players in massively multiplayer online role playing game by classification algorithms

Zhongqqiang Zhang, Hiroaki Anada, Junpei Kawamoto, Kouichi Sakurai

29th IEEE International Conference on Advanced Information Networking and Applications, AINA 2015 Proceedings - IEEE 29th International Conference on Advanced Information Networking and Applications, AINA 2015 2015-April 406 - 413 2015.4

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DOI： 10.1109/AINA.2015.214
Detection of Android ad library focusing on HTTP connections and view object redraw behaviors

Naoya Kajiwara, Junpei Kawamoto, Shinichi Matsumoto, Yoshiaki Hori, Kouichi Sakurai

2015 International Conference on Information Networking, ICOIN 2015 2015 International Conference on Information Networking, ICOIN 2015 2015-January 104 - 109 2015.3

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DOI： 10.1109/ICOIN.2015.7057865
Detection of Illegal Players in Massively Multiplayer Online Role Playing Game by Classification Algorithms. Reviewed International journal

Zhongqqiang Zhang, Hiroaki Aanada, Junpei Kawamoto, Kouichi Sakurai

AINA, IEEE Computer Society 2015.3

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Provably Secure Anonymous Authentication Scheme for Roaming Service in Global Mobility Networks Reviewed International journal

Kuo-Yang Wu, Kuo-Yu Tsai, Tzong-Chen Wu, Kouichi Sakurai

J. Inf. Sci. Eng. 31 ( 2 ) 727 - 742 2015.3

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Parallelization of QUAD stream cipher using linear recurring sequences on graphics processing units Reviewed

Satoshi Tanaka, Chen-Mou Cheng, Takanori Yasuda, Kouichi Sakurai

Proceedings - 2014 2nd International Symposium on Computing and Networking, CANDAR 2014 543 - 548 2015.2

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DOI： 10.1109/CANDAR.2014.85
Parallelization of QUAD stream cipher using linear recurring sequences on graphics processing units

Satoshi Tanaka, Chen Mou Cheng, Takanori Yasuda, Kouichi Sakurai

2nd International Symposium on Computing and Networking, CANDAR 2014 Proceedings - 2014 2nd International Symposium on Computing and Networking, CANDAR 2014 543 - 548 2015.2

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DOI： 10.1109/CANDAR.2014.85
Message from the workshop/symposium chairs TrustCom 2014 Reviewed

Yang Xiang, Kouichi Sakurai

Quaternary International xx 2015.1

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DOI： 10.1109/TrustCom.2014.141
Identity-embedding method for decentralized public-key infrastructure

Hiroaki Anada, Junpei Kawamoto, Jian Weng, Kouichi Sakurai

6th International Conference on Trusted Systems, INTRUST 2014 Trusted Systems - 6th International Conference, INTRUST 2014, Revised Selected Papers 9473 1 - 14 2015.1

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DOI： 10.1007/978-3-319-27998-5_1
Hybrid encryption scheme using terminal fingerprint and its application to attribute-based encryption without key misuse

Chunlu Chen, Hiroaki Anada, Junpei Kawamoto, Kouichi Sakurai

3rd IFIP TC 5/8 International Conference on Information and Communication Technology, ICT-EurAsia 2015 and 9th IFIP WG 8.9 Working Conference on Research and Practical Issues of Enterprise Information Systems, CONFENIS 2015 Information and Communication Technology - 3rd IFIP TC 5/8 International Conference, ICT-EurAsia 2015 and 9th IFIP WG 8.9 Working Conference, CONFENIS 2015 Held as Part of WCC 2015, Proceedings 9357 255 - 264 2015.1

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DOI： 10.1007/978-3-319-24315-3_26
Evaluation of solving time for multivariate quadratic equation system using XL algorithm over small finite fields on GPU

Satoshi Tanaka, Chen Mou Cheng, Kouichi Sakurai

2nd International Conference on Mathematics and Computing, ICMC 2015 Mathematics and Computing - ICMC 2015 139 349 - 361 2015.1

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DOI： 10.1007/978-81-322-2452-5_24
A note on the security of KHL scheme Reviewed

Jian Weng, Yunlei Zhao, Robert H. Deng, Shengli Liu, Yanjiang Yang, Kouichi Sakurai

Theoretical Computer Science 602 1 - 6 2015.1

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DOI： 10.1016/j.tcs.2015.07.051
Privacy-aware cloud-based input method editor

Junpei Kawamoto, Kouichi Sakurai

2014 IEEE/CIC International Conference on Communications in China, ICCC 2014 2014 IEEE/CIC International Conference on Communications in China, ICCC 2014 209 - 213 2015.1

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DOI： 10.1109/ICCChina.2014.7008273
Special section on cryptography and information security Reviewed

Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E98A ( 1 ) 1 - 2 2015.1

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Securing sensor networks by moderating frequencies

Pinaki Sarkar, Priyatosh Mahish, Morshed Uddin Chowdhury, Kouichi Sakurai

10th International Conference on Security and Privacy in Communication Networks, SecureComm 2014 International Conference on Security and Privacy in Communication Networks - 10th International ICST Conference, SecureComm 2014, Revised Selected Papers 153 173 - 185 2015.1

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DOI： 10.1007/978-3-319-23802-9_15
Provably secure anonymous authentication scheme for roaming service in global mobility networks Reviewed

Kuo Yan Wu, Kuo Y. Tsai, Tzong Che Wu, Kouichi Sakurai

Journal of Information Science and Engineering 31 ( 2 ) 727 - 742 2015.1

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A proposal for detecting distributed cyber-attacks using automatic thresholding

Yaokai Feng, Yoshiaki Hori, Kouichi Sakurai

10th Asia Joint Conference on Information Security, AsiaJCIS 2015 Proceedings - 2015 10th Asia Joint Conference on Information Security, AsiaJCIS 2015 152 - 159 2015

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DOI： 10.1109/AsiaJCIS.2015.22
Reconstructing and visualizing evidence of artifact from firefox sessionstorage

Shinichi Matsumoto, Yuya Onitsuka, Junpei Kawamoto, Kouichi Sakurai

15th International Workshop on Information Security Applications, WISA 2014 Information Security Applications - 15th International Workshop, WISA 2014, Revised Selected Papers 8909 83 - 94 2015

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DOI： 10.1007/978-3-319-15087-1_7
Plaintext checkable encryption with designated checker Reviewed

Angsuman Das, Avishek Adhikari, Kouichi Sakurai

Advances in Mathematics of Communications 9 ( 1 ) 37 - 53 2015

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DOI： 10.3934/amc.2015.9.37
Evaluation of gamma ray durability and its application of shielded RF tags

Nobuyuki Teraura, Kunio Ito, Daisuke Kobayashi, Kouichi Sakurai

23rd International Conference on Nuclear Engineering: Nuclear Power - Reliable Global Energy, ICONE 2015 ICONE 2015 - 23rd International Conference on Nuclear Engineering: Nuclear Power - Reliable Global Energy 2015-January 2015

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Evaluation of a zero-watermarking-type steganography Reviewed

Hirokazu Ishizuka, Isao Echizen, Keiichi Iwamura, Kouichi Sakurai

Lecture Notes in Computer Science 9023 613 - 624 2015

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DOI： 10.1007/978-3-319-19321-2_47
Parallelization of QUAD Stream Cipher Using Linear Recurring Sequences on Graphics Processing Units. Reviewed International journal

Satoshi TANAKA, Chen-Mou CHENG, Takanori YASUDA, Kouichi Sakurai

CANDAR 2014: 543-548 2014.12

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Evaluation of the identity and compatibility of multi-valued cells in two-dimensional codes using smartphones Reviewed

Nobuyuki Teraura, Kouichi Sakurai

Proceedings - IEEE 7th International Conference on Service-Oriented Computing and Applications, SOCA 2014 252 - 259 2014.12

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DOI： 10.1109/SOCA.2014.17
Towards "receipt-freeness" in remote biometric authentication

Yoshifumi Ueshige, Kouichi Sakurai

5th International Conference on Emerging Security Technologies, EST 2014 Proceedings - 2014 International Conference on Emerging Security Technologies, EST 2014 8 - 12 2014.12

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DOI： 10.1109/EST.2014.22
Evaluation of the identity and compatibility of multi-valued cells in two-dimensional codes using smartphones

Nobuyuki Teraura, Kouichi Sakurai

7th IEEE International Conference on Service-Oriented Computing and Applications, SOCA 2014 Proceedings - IEEE 7th International Conference on Service-Oriented Computing and Applications, SOCA 2014 252 - 259 2014.12

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DOI： 10.1109/SOCA.2014.17
A zero-watermarking-like steganography and potential applications

Hirokazu Ishizuka, Isao Echizen, Keiichi Iwamura, Kouichi Sakurai

10th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIH-MSP 2014 Proceedings - 2014 10th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIH-MSP 2014 459 - 462 2014.12

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DOI： 10.1109/IIH-MSP.2014.121
Comparison of access pattern protection schemes and proposals for efficient implementation Reviewed

Yuto Nakano, Shinsaku Kiyomoto, Yutaka Miyake, Kouichi Sakurai

IEICE Transactions on Information and Systems E97D ( 10 ) 2576 - 2585 2014.10

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DOI： 10.1587/transinf.2013THP0007
Comparison of Access Pattern Protection Schemes and Proposals for Efficient Implementation Reviewed

Yuto Nakano, Shinsaku Kiyomoto, Yutaka Miyake, Kouichi Sakurai

IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS E97D ( 10 ) 2576 - 2585 2014.10

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DOI： 10.1587/transinf.2013THP0007
Efficient variant of Rainbow using sparse secret keys Reviewed

Takanori Yasuda, Tsuyoshi Takagi, Kouichi Sakurai

Journal of Wireless Mobile Networks, Ubiquitous Computing, and Dependable Applications 5 ( 3 ) 3 - 13 2014.9

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Collaborative agglomerative document clustering with limited information disclosure Reviewed International journal

Chunhua Su, Jianying Zho, Feng Bao, Tsuyoshi Takagi, Kouichi Sakurai

Security and Communication Networks 7 ( 6 ) 964 - 978 2014.6

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Collaborative agglomerative document clustering with limited information disclosure Reviewed

Chunhua Su, Jianying Zhou, Feng Bao, Tsuyoshi Takagi, Kouichi Sakurai

SECURITY AND COMMUNICATION NETWORKS 7 ( 6 ) 964 - 978 2014.6

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DOI： 10.1002/sec.811
Welcome to ASIACCS 2014! Reviewed

Trent Jaeger, Kouichi Sakurai, Shiho Moriai

Quaternary International iii 2014.6

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An enhanced audio ownership protection scheme based on visual cryptography. Reviewed International journal

Rimba Whidiana Ciptasari, Kyung Hyune Rhee, Kouichi Sakurai

EURASIP J. Information Security 2014.2

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A parameterless learning algorithm for behavior-based detection

Can Wang, Yaokai Feng, Junpei Kawamoto, Yoshiaki Hori, Kouichi Sakurai

2014 9th Asia Joint Conference on Information Security, AsiaJCIS 2014 Proceedings - 2014 9th Asia Joint Conference on Information Security, AsiaJCIS 2014 11 - 18 2014.1

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DOI： 10.1109/AsiaJCIS.2014.29
Security of Multivariate Signature Scheme Using Non-commutative Rings Reviewed

Takanori Yasuda, Tsuyoshi Takagi, Kouichi Sakurai

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E97A ( 1 ) 245 - 252 2014.1

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DOI： 10.1587/transfun.E97.A.245
Fast Implementation of KCipher-2 for Software and Hardware Reviewed

Yuto Nakano, Kazuhide Fukushima, Shinsaku Kiyomoto, Tsukasa Ishiguro, Yutaka Miyake, Toshiaki Tanaka, Kouichi Sakurai

IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS E97D ( 1 ) 43 - 52 2014.1

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DOI： 10.1587/transinf.E97.D.43
Survey and new idea for attribute-based identification scheme secure against reset attacks

Ji Jian Chin, Hiroaki Anada, Seiko Arita, Kouichi Sakurai, Swee Huay Heng, Raphael Phan

4th International Cryptology and Information Security Conference 2014, Cryptology 2014 Conference Proceedings - Cryptology 2014 Proceedings of the 4th International Cryptology and Information Security Conference 2014 39 - 47 2014.1

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Security of multivariate signature scheme using non-commutative rings? Reviewed

Takanori Yasuda, Tsuyoshi Takagi, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E97-A ( 1 ) 245 - 252 2014.1

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DOI： 10.1587/transfun.E97.A.245
Security model and analysis of fhmqv, Revisited

Shengli Liu, Kouichi Sakurai, Jian Weng, Fangguo Zhang, Yunlei Zhao, Yunlei Zhao

9th China International Conference on Information Security and Cryptology, Inscrypt 2013 Information Security and Cryptology - 9th International Conference, Inscrypt 2013, Revised Selected Papers 255 - 269 2014.1

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DOI： 10.1007/978-3-319-12087-4_16
Fast implementation of Kcipher-2 for software and hardware Reviewed

Yuto Nakano, Kazuhide Fukushima, Shinsaku Kiyomoto, Tsukasa Ishiguro, Yutaka Miyake, Toshiaki Tanaka, Kouichi Sakurai

IEICE Transactions on Information and Systems E97-D ( 1 ) 43 - 52 2014.1

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DOI： 10.1587/transinf.E97.D.43
Efficient variant of rainbow without triangular matrix representation

Takanori Yasuda, Tsuyoshi Takagi, Kouichi Sakurai

2nd IFIP TC5/8 International Conference on Information and Communication Technology, ICT-EurAsia 2014 Information and Communication Technology - Second IFIP TC5/8 International Conference, ICT-EurAsia 2014, Proceedings 8407 LNCS 532 - 541 2014.1

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DOI： 10.1007/978-3-642-55032-4_55
Attribute-based signatures without pairings via the Fiat-Shamir paradigm

Hiroaki Anada, Seiko Arita, Kouichi Sakurai

2nd ACM Asia Public-Key Cryptography Workshop, AsiaPKC 2014 ASIAPKC 2014 - Proceedings of the 2nd ACM Workshop on ASIA Public-Key Cryptography 49 - 58 2014.1

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DOI： 10.1145/2600694.2600696
An enhanced audio ownership protection scheme based on visual cryptography Reviewed

Rimba Whidiana Ciptasari, Kyung Hyune Rhee, Kouichi Sakurai

Eurasip Journal on Information Security 2014 2014.1

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DOI： 10.1186/1687-417X-2014-2
Acquisition of evidence of web storage in HTML5 web browsers from memory image

Shinichi Matsumoto, Kouichi Sakurai

2014 9th Asia Joint Conference on Information Security, AsiaJCIS 2014 Proceedings - 2014 9th Asia Joint Conference on Information Security, AsiaJCIS 2014 148 - 155 2014.1

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DOI： 10.1109/AsiaJCIS.2014.30
A Method of Digital Rights Management based on Bitcoin Protocol

Motoki Kitahara, Junpei Kawamoto, Kouichi Sakurai

8th International Conference on Ubiquitous Information Management and Communication, ICUIMC 2014 Proceedings of the 8th International Conference on Ubiquitous Information Management and Communication, ICUIMC 2014 2014

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DOI： 10.1145/2557977.2558034
Implementation of efficient operations over GF(2³²) using graphics processing units

Satoshi Tanaka, Takanori Yasuda, Kouichi Sakurai

2nd IFIP TC5/8 International Conference on Information and Communication Technology, ICT-EurAsia 2014 Information and Communication Technology - Second IFIP TC5/8 International Conference, ICT-EurAsia 2014, Proceedings 8407 LNCS 602 - 611 2014

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DOI： 10.1007/978-3-642-55032-4_62
Fine-grained conditional proxy re-encryption and application

Yanjiang Yang, Haibing Lu, Jian Weng, Youcheng Zhang, Kouichi Sakurai

21st International Conference on Neural Information Processing, ICONIP 2014 Provable Security - 8th International Conference, ProvSec 2014, Proceedings 8782 206 - 222 2014

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Fine-grained access control aware multi-user data sharing with secure keyword search Reviewed

Fangming Zhao, Takashi Nishide, Kouichi Sakurai

IEICE Transactions on Information and Systems E97-D ( 7 ) 1790 - 1803 2014

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DOI： 10.1587/transinf.E97.D.1790
Collaborative agglomerative document clustering with limited information disclosure Reviewed

Chunhua Su, Jianying Zhou, Feng Bao, Tsuyoshi Takagi, Kouichi Sakurai

Security and Communication Networks 7 ( 6 ) 964 - 978 2014

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DOI： 10.1002/sec.811
An efficient robust secret sharing scheme with optimal cheater resiliency

Partha Sarathi Roy, Avishek Adhikari, Rui Xu, Kirill Morozov, Kouichi Sakurai

4th International Conference on Security, Privacy, and Applied Cryptography Engineering, SPACE 2014 Security, Privacy, and Applied Cryptography Engineering - 4th International Conference, SPACE 2014, Proceedings 8804 47 - 58 2014

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A competitive three-level pruning technique for information security Reviewed

Morshed Chowdhury, Jemal Abawajy, Andrei Kelarev, Kouichi Sakurai

Communications in Computer and Information Science 490 25 - 32 2014

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DOI： 10.1007/978-3-662-45670-5
Performance evaluation of information theoretic secure multi-channel transmission on multihop wireless network

Wataru Tsuda, Yoshiaki Hori, Kouichi Sakurai

2013 IEEE 8th International Conference on Broadband, Wireless Computing, Communication and Applications, BWCCA 2013 Proceedings - 2013 8th International Conference on Broadband, Wireless Computing, Communication and Applications, BWCCA 2013 570 - 574 2013.12

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DOI： 10.1109/BWCCA.2013.99
Exploiting reference images for image splicing verification

Rimba Whidiana Ciptasari, Kyung Hyune Rhee, Kouichi Sakurai

Digital Investigation, Volume 10 2013.10

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Reliable workflow scheduling with less resource redundancy

Laiping Zhao, Yizhi Ren, Kouichi Sakurai

Parallel Computing, Volume 39(10) 2013.10

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Multivariate signature scheme using quadratic forms

Takanori Yasuda, Tsuyoshi Takagi, Kouichi Sakurai

5th International Workshop on Post-Quantum Cryptography, PQCrypto 2013 Post-Quantum Cryptography - 5th International Workshop, PQCrypto 2013, Proceedings 7932 LNCS 243 - 258 2013.9

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DOI： 10.1007/978-3-642-38616-9_17
A Behavior-based Method for Detecting Distributed Scan Attacks in Darknets

Yaokai Feng, Yoshiaki Hori, Jun'ichi Takeuchi, Kouichi Sakurai

Journal of Information Processing, Volume 21 2013.7

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Reliable workflow scheduling with less resource redundancy Reviewed

Laiping Zhao, Yizhi Ren, Kouichi Sakurai

Parallel Computing 39 ( 10 ) 567 - 585 2013.7

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DOI： 10.1016/j.parco.2013.06.003
A variant of rainbow with shorter secret key and faster signature generation

Takanori Yasuda, Jintai Ding, Tsuyoshi Takagi, Kouichi Sakurai

1st ACM Workshop on Asia Public-Key Cryptography, AsiaPKC 2013 AsiaPKC 2013 - Proceedings of the 1st ACM Workshop on Asia Public-Key Cryptography 57 - 62 2013.5

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DOI： 10.1145/2484389.2484401
Upper bound of the length of information embedd in RSA public key efficiently

Motoki Kitahara, Takanori Yasuda, Takashi Nishide, Kouichi Sakurai

1st ACM Workshop on Asia Public-Key Cryptography, AsiaPKC 2013 AsiaPKC 2013 - Proceedings of the 1st ACM Workshop on Asia Public-Key Cryptography 33 - 38 2013.5

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DOI： 10.1145/2484389.2484396
Efficient implementation for QUAD stream cipher with GPUs Reviewed

Satoshi Tanaka, Takashi Nishide, Kouichi Sakurai

Computer Science and Information Systems 10 ( 2 SPL ) 897 - 911 2013.4

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DOI： 10.2298/CSIS121102040T
Efficient implementation for QUAD stream cipher with GPUs Reviewed

Satoshi Tanaka, Takashi Nishide, Kouichi Sakurai

Computer Science and Information Systems 10 ( 2 ) 897 - 911 2013.4

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DOI： 10.2298/CSIS121102040T
Supporting Secure Provenance Update by Keeping "Provenance" of the Provenance International journal

Amril Syalim, Takashi Nishide, Kouichi Sakurai

ICT-EurAsia 2013 2013.3

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Confidentiality of 2D Code using Infrared with Cell-level Error Correction

Nobuyuki Teraura, Kouichi Sakurai

International Journal of Interactive Multimedia and Artificial Intelligence, Volume 2 2013.3

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Efficient implementation for QUAD stream cipher with GPUs

Satoshi Tanaka, Takashi Nishide, Kouichi Sakurai

Computer Science and Information Systems, Volume 10 2013.2

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Botnet command and control based on Short Message Service and human mobility Reviewed

Jingyu Hua, Kouichi Sakurai

Computer Networks 57 ( 2 ) 579 - 597 2013.2

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DOI： 10.1016/j.comnet.2012.06.007
Botnet command and control based on Short Message Service and human mobility Reviewed

Jingyu Hua, Kouichi Sakurai

Computer Networks 57 ( 2 ) 579 - 597 2013.2

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DOI： 10.1016/j.comnet.2012.06.007
Analysis of methods for detecting compromised nodes and its countermeasures

Fangming Zhao, Takashi Nishide, Yoshiaki Hori, Kouichi Sakurai

International Conference on IT Convergence and Security, ICITCS 2012 IT Convergence and Security 2012 215 LNEE 53 - 60 2013.2

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DOI： 10.1007/978-94-007-5860-5_7
Botnet command and control based on Short Message Service and human mobility

Jingyu Hua, Kouichi Sakurai

Computer Networks [and ISDN Systems], Volume 57 2013.2

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Evolution of cooperation in reputation system by group-based scheme

Yizhi Ren, Mingchu Li, Yang Xiang, Yongrui Cui, Kouichi Sakurai

The Journal of Supercomputing, Volume 63 2013.1

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Evolution of cooperation in reputation system by group-based scheme Reviewed

Yizhi Ren, Mingchu Li, Yang Xiang, Yongrui Cui, Kouichi Sakurai

Journal of Supercomputing 63 ( 1 ) 171 - 190 2013.1

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DOI： 10.1007/s11227-010-0498-8
Exploiting reference images for image splicing verification Reviewed

Rimba Whidiana Ciptasari, Kyung Hyune Rhee, Kouichi Sakurai

Digital Investigation 10 ( 3 ) 246 - 258 2013.1

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DOI： 10.1016/j.diin.2013.06.014
Evolution of cooperation in reputation system by group-based scheme Reviewed

Yizhi Ren, Mingchu Li, Yang Xiang, Yongrui Cui, Kouichi Sakurai

Journal of Supercomputing 63 ( 1 ) 171 - 190 2013.1

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DOI： 10.1007/s11227-010-0498-8
General Fault Attacks on Multivariate Public Key Cryptosystems

Yasufumi Hashimoto, Tsuyoshi Takagi, Kouichi Sakurai

IEICE Transactions, Volume 96-A 2013.1

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A behavior-based method for detecting distributed scan attacks in darknets Reviewed

Yaokai Feng, Yoshiaki Hori, Kouichi Sakurai, Junnichi Takeuchi

Journal of Information Processing 21 ( 3 ) 527 - 538 2013

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DOI： 10.2197/ipsjjip.21.527
The development of radiation-resistant rf TAGS for use at nuclear power plants

Nobuyuki Teraura, Kunio Ito, Naoki Takahashi, Kouichi Sakurai

2013 21st International Conference on Nuclear Engineering, ICONE 2013 Plant Operations, Maintenance, Engineering, Modifications, Life Cycle and Balance of Plant; Nuclear Fuel and Materials; Radiation Protection and Nuclear Technology Applications 1 2013

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DOI： 10.1115/ICONE21-16605
Supporting secure provenance update by keeping "provenance" of the provenance

Amril Syalim, Takashi Nishide, Kouichi Sakurai

International Conference on Information and Communication Technology, ICT-EurAsia 2013 Information and Communication Technology - International Conference, ICT-EurAsia 2013, Proceedings 7804 LNCS 363 - 372 2013

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DOI： 10.1007/978-3-642-36818-9_40
Secure and privacy preserving hierarchical wireless sensor networks using hybrid key management technique

Sushmita Ruj, Kouichi Sakurai

2013 IEEE Global Communications Conference, GLOBECOM 2013 2013 IEEE Global Communications Conference, GLOBECOM 2013 402 - 407 2013

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DOI： 10.1109/GLOCOM.2013.6831104
Improving Cost-Efficiency through Failure-Aware Server Management and Scheduling in Cloud

Laiping Zhao, Kouichi Sakurai

2nd International Conference on Cloud Computing and Services Science, CLOSER 2012 Cloud Computing and Services Science - 2nd International Conference, CLOSER 2012, Revised Selected Papers 367 CCIS 23 - 38 2013

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DOI： 10.1007/978-3-319-04519-1_2
Image splicing verification based on pixel-based alignment method

Rimba Whidiana Ciptasari, Kyung Hyune Rhee, Kouichi Sakurai

11th International Workshop on Digital Forensics and Watermaking, IWDW 2012 Digital Forensics and Watermaking - 11th International Workshop, IWDW 2012, Revised Selected Papers 7809 LNCS 198 - 212 2013

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DOI： 10.1007/978-3-642-40099-5_17
General fault attacks on multivariate public key cryptosystems Reviewed

Yasufumi Hashimoto, Tsuyoshi Takagi, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E96-A ( 1 ) 196 - 205 2013

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DOI： 10.1587/transfun.E96.A.196
Efficient computing over GF(2¹⁶) using graphics processing unit

Satoshi Tanaka, Takanori Yasuda, Bo Yin Yang, Chen Mou Cheng, Kouichi Sakurai

7th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2013 Proceedings - 7th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2013 843 - 846 2013

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DOI： 10.1109/IMIS.2013.151
Detection of android API call using logging mechanism within android framework

Yuuki Nishimoto, Naoya Kajiwara, Shinichi Matsumoto, Yoshiaki Hori, Kouichi Sakurai

9th International Conference on Security and Privacy in Communication Networks, SecureComm 2013 Security and Privacy in Communication Networks - 9th International ICST Conference, SecureComm 2013, Revised Selected Papers 127 LNICST 393 - 404 2013

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Detecting HTTP-based botnet based on characteristic of the C&C session using by SVM

Kazumasa Yamauchi, Yoshiaki Hori, Kouichi Sakurai

2013 8th Asia Joint Conference on Information Security, AsiaJCIS 2013 Proceedings - 2013 8th Asia Joint Conference on Information Security, AsiaJCIS 2013 63 - 68 2013

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DOI： 10.1109/ASIAJCIS.2013.17
DASC 2013 Message from the general chairs Reviewed

Vincenzo Piuri, Jose M.Alcaraz Calero, Kouichi Sakurai, Yiming Pi

Proceedings - 2013 IEEE 11th International Conference on Dependable, Autonomic and Secure Computing, DASC 2013 2013

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DOI： 10.1109/DASC.2013.7
A proposal for the privacy leakage verification tool for android application developers

Shinichi Matsumoto, Kouichi Sakurai

7th International Conference on Ubiquitous Information Management and Communication, ICUIMC 2013 Proceedings of the 7th International Conference on Ubiquitous Information Management and Communication, ICUIMC 2013 2013

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DOI： 10.1145/2448556.2448610
Guest editorial Managing insider security threats (MIST 2012 Volume 1) Reviewed

Kouichi Sakurai, Dieter Gollmann

Journal of Wireless Mobile Networks, Ubiquitous Computing, and Dependable Applications 3 ( 4 ) 1 - 3 2012.12

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Workflow scheduling with fault tolerance

Laiping Zhao, Kouichi Sakurai

Network and Traffic Engineering in Emerging Distributed Computing Applications 94 - 123 2012.12

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DOI： 10.4018/978-1-4666-1888-6.ch005
Revocation and tracing based on ternary tree Towards optimal broadcast encryption scheme

Kazuhide Fukushima, Shinsaku Kiyomoto, Yutaka Miyake, Kouichi Sakurai

8th International Joint Conference on e-Business and Telecommunications, ICETE 2011 E-Business and Telecommunications International Joint Conference, ICETE 2011 Seville, Spain, July 18-21, 2011 Revised Selected Papers 233 - 248 2012.12

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DOI： 10.1007/978-3-642-35755-8_17
Cryptanalysis of randomized arithmetic codes based on markov model

Liang Zhao, Takashi Nishide, Avishek Adhikari, Kyung Hyune Rhee, Kouichi Sakurai

7th China International Conference on Information Security and Cryptography, Inscrypt 2011 Information Security and Cryptology - 7th International Conference, Inscrypt 2011, Revised Selected Papers 341 - 362 2012.11

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DOI： 10.1007/978-3-642-34704-7-24
A repeated game approach for analyzing the collusion on selective forwarding in multihop wireless networks Reviewed

Dong Hao, Xiaojuan Liao, Avishek Adhikari, Kouichi Sakurai, Makoto Yokoo

Computer Communications 35 ( 17 ) 2125 - 2137 2012.10

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DOI： 10.1016/j.comcom.2012.07.006
A repeated game approach for analyzing the collusion on selective forwarding in multihop wireless networks Reviewed

Dong Hao, Xiaojuan Liao, Avishek Adhikari, Kouichi Sakurai, Makoto Yokoo

COMPUTER COMMUNICATIONS 35 ( 17 ) 2125 - 2137 2012.10

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DOI： 10.1016/j.comcom.2012.07.006
Providing secure location-aware services for cooperative vehicular Ad Hoc networks Reviewed

Chul Sur, Youngho Park, Kouichi Sakurai, Kyung Hyune Rhee

Journal of Internet Technology 13 ( 4 ) 631 - 644 2012.10

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Mixed-strategy game based trust management for clustered wireless sensor networks

Dong Hao, Avishek Adhikari, Kouichi Sakurai

3rd International Conference on Trusted Systems, INTRUST 2011 Trusted Systems - Third International Conference, INTRUST 2011, Revised Selected Papers 7222 LNCS 239 - 257 2012.9

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DOI： 10.1007/978-3-642-32298-3_16
On revenue driven server management incloud

Laiping Zhao, Kouichi Sakurai

2nd International Conference on Cloud Computing and Services Science, CLOSER 2012 CLOSER 2012 - Proceedings of the 2nd International Conference on Cloud Computing and Services Science 295 - 305 2012.8

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On the security analysis of an image scrambling encryption of pixel bit and its improved scheme based on self-correlation encryption Reviewed

Liang Zhao, Avishek Adhikari, Di Xiao, Kouichi Sakurai

COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION 17 ( 8 ) 3303 - 3327 2012.8

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DOI： 10.1016/j.cnsns.2011.12.015
On the security analysis of an image scrambling encryption of pixel bit and its improved scheme based on self-correlation encryption Reviewed

Liang Zhao, Avishek Adhikari, Di Xiao, Kouichi Sakurai

Communications in Nonlinear Science and Numerical Simulation 17 ( 8 ) 3303 - 3327 2012.8

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DOI： 10.1016/j.cnsns.2011.12.015
Securing provenance of distributed processes in an untrusted environment Reviewed

Amril Syalim, Takashi Nishide, Kouichi Sakurai

IEICE Transactions on Information and Systems E95-D ( 7 ) 1894 - 1907 2012.7

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DOI： 10.1587/transinf.E95.D.1894
Cooperatively securing network coding against pollution attacks with incentive mechanism

Yichao Xu, Kouichi Sakurai

6th International Conference on Ubiquitous Information Management and Communication, ICUIMC'12 Proceedings of the 6th International Conference on Ubiquitous Information Management and Communication, ICUIMC'12 2012.5

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DOI： 10.1145/2184751.2184815
Flexible service selection with user-specific QoS support in service-oriented architecture Reviewed

Laiping Zhao, Yizhi Ren, Mingchu Li, Kouichi Sakurai

Journal of Network and Computer Applications 35 ( 3 ) 962 - 973 2012.5

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DOI： 10.1016/j.jnca.2011.03.013
Adaptive and composable non-interactive string-commitment protocols

Huafei Zhu, Tadashi Araragi, Takashi Nishide, Kouichi Sakurai

7th International Joint Conference on e-Business and Telecommunications, ICETE 2010 e-Business and Telecommunications - 7th International Joint Conference, ICETE 2010, Revised Selected Papers 222 CCIS 233 - 242 2012.3

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DOI： 10.1007/978-3-642-25206-8_15
Universally composable non-committing encryptions in the presence of adaptive adversaries

Huafei Zhu, Tadashi Araragi, Takashi Nishide, Kouichi Sakurai

7th International Joint Conference on e-Business and Telecommunications, ICETE 2010 e-Business and Telecommunications - 7th International Joint Conference, ICETE 2010, Revised Selected Papers 222 CCIS 274 - 288 2012.3

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DOI： 10.1007/978-3-642-25206-8_18
Security analysis of offline E-cash systems with malicious insider Reviewed

Takashi Nishide, Shingo Miyazaki, Kouichi Sakurai

Journal of Wireless Mobile Networks, Ubiquitous Computing, and Dependable Applications 3 ( 1-2 ) 55 - 71 2012.3

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Reducing the key size of rainbow using non-commutative rings

Takanori Yasuda, Kouichi Sakurai, Tsuyoshi Takagi

12th Cryptographers' Track at the RSA Conference, CT-RSA 2012 Topics in Cryptology, CT-RSA 2012 - The Cryptographers' Track at the RSA Conference 2012, Proceedings 7178 LNCS 68 - 83 2012.3

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DOI： 10.1007/978-3-642-27954-6_5
A finite equivalence of verifiable multi-secret sharing Reviewed

Hui Zhao, Mingchu Li, Kouichi Sakurai, Yizhi Ren, Jonathan Z. Sun, Fengying Wang

International Journal of Computational Intelligence Systems 5 ( 1 ) 1 - 12 2012.1

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DOI： 10.1080/18756891.2012.670517
A behavior-based detection method for outbreaks of low-rate attacks

Yaokai Feng, Yoshiaki Hori, Kouichi Sakurai, Junnichi Takeuchi

2012 IEEE/IPSJ 12th International Symposium on Applications and the Internet, SAINT 2012 Proceedings - 2012 IEEE/IPSJ 12th International Symposium on Applications and the Internet, SAINT 2012 267 - 272 2012

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DOI： 10.1109/SAINT.2012.50
Weakness of provably secure searchable encryption against frequency analysis

Takanori Suga, Takashi Nishide, Kouichi Sakurai

5th Mosharaka International Conference on Communications, Computers and Applications, MIC-CCA 2012 Proceedings of the 5th International Conference on Communications, Computers and Applications, MIC-CCA 2012 142 - 147 2012

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Secure keyword search using bloom filter with specified character positions

Takanori Suga, Takashi Nishide, Kouichi Sakurai

6th International Conference on Provable Security, ProvSec 2012 Provable Security - 6th International Conference, ProvSec 2012, Proceedings 7496 LNCS 235 - 252 2012

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DOI： 10.1007/978-3-642-33272-2_15
Proposal of the hierarchical file server groups for implementing mandatory access control

Taketoshi Sakuraba, Kouichi Sakurai

6th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2012 Proceedings - 6th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2012 639 - 644 2012

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DOI： 10.1109/IMIS.2012.129
Preventing the access of fraudulent WEB sites by using a special two-dimensional code

Nobuyuki Teraura, Kouichi Sakurai

6th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2012 Proceedings - 6th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2012 645 - 650 2012

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DOI： 10.1109/IMIS.2012.57
Multi-user keyword search scheme for secure data sharing with fine-grained access control

Fangming Zhao, Takashi Nishide, Kouichi Sakurai

14th International Conference on Information Security and Cryptology, ICISC 2011 Information Security and Cryptology, ICISC 2011 - 14th International Conference, Revised Selected Papers 7259 LNCS 406 - 418 2012

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DOI： 10.1007/978-3-642-31912-9_27
Message from ISSR-2012 workshop chairs Reviewed

Kouichi Sakurai, Lizhe Wang, Ei Sayed M Ei-Alfy

Quaternary International 2012

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DOI： 10.1109/TrustCom.2012.311
Information hiding of two-dimensional code by multi-layer optical

Nobuyuki Teraura, Kouichi Sakurai

2012 10th IEEE International Symposium on Parallel and Distributed Processing with Applications, ISPA 2012 Proceedings of the 2012 10th IEEE International Symposium on Parallel and Distributed Processing with Applications, ISPA 2012 770 - 777 2012

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DOI： 10.1109/ISPA.2012.113
Information hiding in subcells of a two-dimensional code

Nobuyuki Teraura, Kouichi Sakurai

1st IEEE Global Conference on Consumer Electronics, GCCE 2012 1st IEEE Global Conference on Consumer Electronics 2012, GCCE 2012 652 - 656 2012

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DOI： 10.1109/GCCE.2012.6379943
Efficient parallel evaluation of multivariate quadratic polynomials on GPUs

Satoshi Tanaka, Tung Chou, Bo Yin Yang, Chen Mou Cheng, Kouichi Sakurai

13th International Workshop on Information Security Applications, WISA 2012 Information Security Applications - 13th International Workshop, WISA 2012, Revised Selected Papers 7690 LNCS 28 - 42 2012

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Efficient implementation of evaluating multivariate quadratic system with GPUs

Satoshi Tanaka, Takashi Nishide, Kouichi Sakurai

6th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2012 Proceedings - 6th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2012 660 - 664 2012

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DOI： 10.1109/IMIS.2012.139
Differential fault analysis of full lblock

Liang Zhao, Takashi Nishide, Kouichi Sakurai

3rd International Workshop, Constructive Side-Channel Analysis and Secure Design, COSADE 2012 Constructive Side-Channel Analysis and Secure Design - Third International Workshop, COSADE 2012, Proceedings 7275 LNCS 135 - 150 2012

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DOI： 10.1007/978-3-642-29912-4_11
Communication-efficient anonymous routing protocol for wireless sensor networks using single path tree topology

Shogo Nakamura, Yoshiaki Hori, Kouichi Sakurai

26th IEEE International Conference on Advanced Information Networking and Applications Workshops, WAINA 2012 Proceedings - 26th IEEE International Conference on Advanced Information Networking and Applications Workshops, WAINA 2012 766 - 771 2012

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DOI： 10.1109/WAINA.2012.175
Collaborative behavior visualization and its detection by observing darknet traffic

Satoru Akimoto, Yoshiaki Hori, Kouichi Sakurai

4th International Symposium on Cyberspace Safety and Security, CSS 2012 Cyberspace Safety and Security - 4th International Symposium, CSS 2012, Proceedings 7672 LNCS 212 - 226 2012

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DOI： 10.1007/978-3-642-35362-8_17
Barrier A lightweight hypervisor for protecting kernel integrity via memory isolation

Jingyu Hua, Kouichi Sakurai

27th Annual ACM Symposium on Applied Computing, SAC 2012 27th Annual ACM Symposium on Applied Computing, SAC 2012 1470 - 1477 2012

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DOI： 10.1145/2245276.2232011
Application of scalar multiplication of edwards curves to pairing-based cryptography

Takanori Yasuda, Tsuyoshi Takagi, Kouichi Sakurai

7th International Workshop on Security, IWSEC 2012 Advances in Information and Computer Security - 7th International Workshop on Security, IWSEC 2012, Proceedings 7631 LNCS 19 - 36 2012

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DOI： 10.1007/978-3-642-34117-5-2
Analytic hierarchy process aided key management schemes evaluation in wireless sensor network Reviewed

Ruan Na, Yizhi Ren, Yoshiaki Hori, Kouichi Sakurai

Journal of Networks 7 ( 1 ) 88 - 100 2012

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DOI： 10.4304/jnw.7.1.88-100
Analysis and improvement of privacy-preserving frequent item protocol for accountable computation framework

Chunhua Su, Guilin Wang, Kouichi Sakurai

11th IEEE International Conference on Trust, Security and Privacy in Computing and Communications, TrustCom-2012 Proc. of the 11th IEEE Int. Conference on Trust, Security and Privacy in Computing and Communications, TrustCom-2012 - 11th IEEE Int. Conference on Ubiquitous Computing and Communications, IUCC-2012 1012 - 1017 2012

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DOI： 10.1109/TrustCom.2012.87
An image splicing detection based on interpolation analysis

Rimba W. Ciptasari, Kyung Hyune Rhee, Kouichi Sakurai

13th Pacific-Rim Conference on Multimedia, PCM 2012 Advances in Multimedia Information Processing, PCM 2012 - 13th Pacific-Rim Conference on Multimedia, Proceedings 7674 LNCS 390 - 401 2012

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DOI： 10.1007/978-3-642-34778-8_36
A method for embedding secret key information in RSA public key and its application

Motoki Kitahara, Takashi Nishide, Kouichi Sakurai

6th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2012 Proceedings - 6th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2012 665 - 670 2012

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DOI： 10.1109/IMIS.2012.123
A differential game approach to mitigating primary user emulation attacks in cognitive radio networks

Dong Hao, Kouichi Sakurai

26th IEEE International Conference on Advanced Information Networking and Applications, AINA 2012 Proceedings - 26th IEEE International Conference on Advanced Information Networking and Applications, AINA 2012 495 - 502 2012

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DOI： 10.1109/AINA.2012.84
A security analysis of uniformly-layered rainbow Revisiting Sato-Araki's non-commutative approach to Ong-Schnorr-Shamir signature towards postquantum paradigm

Takanori Yasuda, Kouichi Sakurai

4th International Workshop on Post-Quantum Cryptography, PQCrypto 2011 Post-Quantum Cryptography - 4th International Workshop, PQCrypto 2011, Proceedings 7071 LNCS 275 - 294 2011.12

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DOI： 10.1007/978-3-642-25405-5_18
Towards countermeasure of insider threat in network security

Yoshiaki Hori, Takashi Nishide, Kouichi Sakurai

3rd IEEE International Conference on Intelligent Networking and CollaborativeSystems, INCoS 2011 Proceedings - 3rd IEEE International Conference on Intelligent Networking and Collaborative Systems, INCoS 2011 634 - 636 2011.12

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DOI： 10.1109/INCoS.2011.156
Security of offline anonymous electronic cash systems against insider attacks by untrusted authorities revisited

Takashi Nishide, Kouichi Sakurai

3rd IEEE International Conference on Intelligent Networking and CollaborativeSystems, INCoS 2011 Proceedings - 3rd IEEE International Conference on Intelligent Networking and Collaborative Systems, INCoS 2011 656 - 661 2011.12

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DOI： 10.1109/INCoS.2011.146
Realizing proxy re-encryption in the symmetric world

Amril Syalim, Takashi Nishide, Kouichi Sakurai

International Conference on Informatics Engineering and Information Science, ICIEIS 2011 Informatics Engineering and Information Science - International Conference, ICIEIS 2011, Proceeding 251 CCIS 259 - 274 2011.12

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DOI： 10.1007/978-3-642-25327-0_23
Proactive blacklisting for malicious web sites by reputation evaluation based on domain and IP address registration

Yoshiro Fukushima, Yoshiaki Hori, Kouichi Sakurai

10th IEEE Int. Conf. on Trust, Security and Privacy in Computing and Communications, TrustCom 2011, 8th IEEE Int. Conf. on Embedded Software and Systems, ICESS 2011, 6th Int. Conf. on Frontier of Computer Science and Technology, FCST 2011 Proc. 10th IEEE Int. Conf. on Trust, Security and Privacy in Computing and Communications, TrustCom 2011, 8th IEEE Int. Conf. on Embedded Software and Systems, ICESS 2011, 6th Int. Conf. FCST 2011 352 - 361 2011.12

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DOI： 10.1109/TrustCom.2011.46
General fault attacks on multivariate public key cryptosystems

Yasufumi Hashimoto, Tsuyoshi Takagi, Kouichi Sakurai

4th International Workshop on Post-Quantum Cryptography, PQCrypto 2011 Post-Quantum Cryptography - 4th International Workshop, PQCrypto 2011, Proceedings 7071 LNCS 1 - 18 2011.12

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DOI： 10.1007/978-3-642-25405-5_1
A game theory-based surveillance mechanism against suspicious insiders in MANETs (work-in-progress)

Dong Hao, Yizhi Ren, Kouichi Sakurai

2nd International Conference on Trusted Systems, INTRUST 2010 Trusted Systems - Second International Conference, INTRUST 2010, Revised Selected Papers 6802 LNCS 237 - 252 2011.11

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DOI： 10.1007/978-3-642-25283-9_16
Design and implementation of document access control model based on role and security policy

Liangjian Mao, Shuzhen Yao, Kai Zhang, Kouichi Sakurai

2nd International Conference on Trusted Systems, INTRUST 2010 Trusted Systems - Second International Conference, INTRUST 2010, Revised Selected Papers 6802 LNCS 26 - 36 2011.11

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DOI： 10.1007/978-3-642-25283-9_2
Enhancing SVO logic for mobile IPv6 security protocols Reviewed

Ilsun You, Yoshiaki Hori, Kouichi Sakurai

Journal of Wireless Mobile Networks, Ubiquitous Computing, and Dependable Applications 2 ( 3 ) 26 - 52 2011.9

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Using game theory to classify wireless Ad Hoc network attacks with analysis on countermeasures Reviewed

Xiaojuan Liao, Dong Hao, Kouichi Sakurai

International Journal of Advancements in Computing Technology 3 ( 8 ) 296 - 303 2011.9

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DOI： 10.4156/ijact.vol3.issue8.35
Traceback framework against botmaster by sharing network communication pattern information

Seiichiro Mizoguchi, Keisuke Takemori, Yutaka Miyake, Yoshiaki Hori, Kouichi Sakurai

2011 5th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2011 Proceedings - 2011 5th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2011 639 - 644 2011.9

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DOI： 10.1109/IMIS.2011.152
Towards optimal revocation and tracing schemes - The power of the ternary tree

Kazuhide Fukushima, Shinsaku Kiyomoto, Yutaka Miyake, Kouichi Sakurai

International Conference on Security and Cryptography, SECRYPT 2011 SECRYPT 2011 - Proceedings of the International Conference on Security and Cryptography 37 - 49 2011.9

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Securing location-aware services based on online/offline signatures in VANETs

Chul Sur, Youngho Park, Takashi Nishide, Kouichi Sakurai, Kyung Hyune Rhee

IFIP WG 8.4/8.9 International Cross Domain Conference and Workshop on Availability, Reliability and Security for Business, Enterprise and Health Information Systems, ARES 2011 Availability, Reliability and Security for Business, Enterprise and Health Information Systems - IFIP WG 8.4/8.9 International Cross Domain Conference and Workshop, ARES 2011, Proceedings 271 - 285 2011.9

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DOI： 10.1007/978-3-642-23300-5_21
A SMS-based mobile botnet using flooding algorithm

Jingyu Hua, Kouichi Sakurai

5th Workshop in Information Security Theory and Practice, WISTP 2011 Information Security Theory and Practice Security and Privacy of Mobile Devices in Wireless Communication - 5th IFIP WG 11.2 International Workshop, WISTP 2011, Proceedings 264 - 279 2011.6

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DOI： 10.1007/978-3-642-21040-2_19
A resource minimizing scheduling algorithm with ensuring the deadline and reliability in heterogeneous systems

Laiping Zhao, Yizhi Ren, Kouichi Sakurai

25th IEEE International Conference on Advanced Information Networking and Applications, AINA 2011 Proceedings - 25th IEEE International Conference on Advanced Information Networking and Applications, AINA 2011 275 - 282 2011.6

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DOI： 10.1109/AINA.2011.87
Integrity for the In-flight web page based on a fragile watermarking chain scheme

Peng Gao, Takashi Nishide, Yoshiaki Hori, Kouichi Sakurai

5th International Conference on Ubiquitous Information Management and Communication, ICUIMC 2011 Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication, ICUIMC 2011 2011.5

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DOI： 10.1145/1968613.1968715
Realizing fine-grained and flexible access control to outsourced data with attribute-based cryptosystems

Fangming Zhao, Takashi Nishide, Kouichi Sakurai

7th International Conference on Information Security Practice and Experience, ISPEC 2011 Information Security Practice and Experience - 7th International Conference, ISPEC 2011, Proceedings 6672 LNCS 83 - 97 2011.5

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DOI： 10.1007/978-3-642-21031-0_7
Guest editorial Addressing insider threats and information leakage Reviewed

Christian W. Probst, Ilsun You, Dongwan Shin, Kouichi Sakurai

Journal of Wireless Mobile Networks, Ubiquitous Computing, and Dependable Applications 2 ( 1 ) 1 - 3 2011.3

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Towards formal analysis of wireless LAN security with MIS protocol Reviewed

Ilsun You, Yoshiaki Hori, Kouichi Sakurai

International Journal of Ad Hoc and Ubiquitous Computing 7 ( 2 ) 112 - 120 2011.3

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DOI： 10.1504/IJAHUC.2011.038997
Towards formal analysis of wireless LAN security with MIS protocol Reviewed

Ilsun You, Yoshiaki Hori, Kouichi Sakurai

International Journal of Ad Hoc and Ubiquitous Computing 7 ( 2 ) 112 - 120 2011.3

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DOI： 10.1504/IJAHUC.2011.038997
FineTrust: a fine-grained trust model for peer-to-peer networks Reviewed International journal

Yizhi Ren, MingChu Li, Kouichi Sakurai

Security and Communication Networks 4(1): 61-69 (2011) Vol.4 ( No.1 ) 2011.1

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Enhancing MISP with fast mobile IPv6 security Reviewed

Ilsun You, Jong Hyouk Lee, Yoshiaki Hori, Kouichi Sakurai

Mobile Information Systems 7 ( 3 ) 271 - 283 2011.1

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DOI： 10.3233/MIS-2011-0121
Efficient context-sensitive intrusion detection based on state transition table Reviewed

Jingyu Hua, Mingchu Li, Yizhi Ren, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E94-A ( 1 ) 255 - 264 2011.1

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DOI： 10.1587/transfun.E94.A.255
Distributed Paillier Cryptosystem without Trusted Dealer

Takashi Nishide, Kouichi Sakurai

11th International Workshop on Information Security Applications, WISA 2010 Information Security Applications - 11th International Workshop, WISA 2010, Revised Selected Papers 44 - 60 2011.1

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DOI： 10.1007/978-3-642-17955-6_4
Cryptanalysis on an Image Scrambling Encryption Scheme Based on Pixel Bit

Liang Zhao, Avishek Adhikari, Di Xiao, Kouichi Sakurai

9th International Workshop on Digital Watermarking, IWDW 2010 Digital Watermarking - 9th International Workshop, IWDW 2010, Revised Selected Papers 45 - 59 2011.1

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DOI： 10.1007/978-3-642-18405-5_5
A New Scrambling Evaluation Scheme Based on Spatial Distribution Entropy and Centroid Difference of Bit-Plane

Liang Zhao, Avishek Adhikari, Kouichi Sakurai

9th International Workshop on Digital Watermarking, IWDW 2010 Digital Watermarking - 9th International Workshop, IWDW 2010, Revised Selected Papers 29 - 44 2011.1

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DOI： 10.1007/978-3-642-18405-5_4
FineTrust: a fine-grained trust model for peer-to-peer networks Reviewed International journal

Yizhi Ren, MingChu Li, Kouichi Sakurai

Security and Communication Networks 4(1): 61-69 (2011) Vol.4 ( No.1 ) 2011.1

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A generic evaluation method for key management schemes in wireless sensor network

Ruan Na, Yizhi Ren, Yoshiaki Hori, Kouichi Sakurai

5th International Conference on Ubiquitous Information Management and Communication, ICUIMC 2011 Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication, ICUIMC 2011 2011

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DOI： 10.1145/1968613.1968680
Welcome message from MIST-2011 international workshop co-chairs Reviewed

Ilsun You, Christian W. Probst, Yoshiaki Hori, Kouichi Sakurai

Quaternary International 2011

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DOI： 10.1109/INCoS.2011.171
Performance analysis of key management schemes in wireless sensor network using analytic hierarchy process

Na Ruan, Yizhi Ren, Yoshiaki Hori, Kouichi Sakurai

10th IEEE Int. Conf. on Trust, Security and Privacy in Computing and Communications, TrustCom 2011, 8th IEEE Int. Conf. on Embedded Software and Systems, ICESS 2011, 6th Int. Conf. on Frontier of Computer Science and Technology, FCST 2011 Proc. 10th IEEE Int. Conf. on Trust, Security and Privacy in Computing and Communications, TrustCom 2011, 8th IEEE Int. Conf. on Embedded Software and Systems, ICESS 2011, 6th Int. Conf. FCST 2011 1739 - 1744 2011

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DOI： 10.1109/TrustCom.2011.243
Improvement on secrecy capacity of wireless LAN using matched filter

Ryuzou Nishi, Kirill Morozov, Yoshiaki Hori, Kouichi Sakurai

2011 7th International Conference on Mobile Ad-hoc and Sensor Networks, MSN 2011 Proceedings - 2011 7th International Conference on Mobile Ad-hoc and Sensor Networks, MSN 2011 463 - 469 2011

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DOI： 10.1109/MSN.2011.40
Guest editorial Trusted computing and communications Reviewed

Guojun Wang, Laurence T. Yang, Kouichi Sakurai

Security and Communication Networks 4 ( 1 ) 1 - 2 2011

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DOI： 10.1002/sec.195
FineTrust A fine-grained trust model for peer-to-peer networks Reviewed

Yizhi Ren, Mingchu Li, Kouichi Sakurai

Security and Communication Networks 4 ( 1 ) 61 - 69 2011

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DOI： 10.1002/sec.165
FCST 2011 Welcome message from the program chairs Reviewed

Jianer Chen, Kouichi Sakurai, Cho Li Wang

Quaternary International 2011

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DOI： 10.1109/TrustCom.2011.268
Distributed Paillier cryptosystem without trusted dealer

Takashi Nishide, Kouichi Sakurai

11th International Workshop on Information Security Applications, WISA 2010 Information Security Applications - 11th International Workshop, WISA 2010, Revised Selected Papers 6513 LNCS 44 - 60 2011

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DOI： 10.1007/978-3-642-17955-6-4
Design and implementation of a forced encryption kernel module

Jun Furukawa, Akihiro Sakai, Takashi Nishide, Yoshiaki Hori, Kouichi Sakurai

2011 5th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2011 Proceedings - 2011 5th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2011 607 - 611 2011

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DOI： 10.1109/IMIS.2011.68
Customized program protection for a user customized data protection framework

Kenichi Takahashi, Takanori Matsuzaki, Tsunenori Mine, Kouichi Sakurai

2011 IEEE International Conference on Computer Science and Automation Engineering, CSAE 2011 Proceedings - 2011 IEEE International Conference on Computer Science and Automation Engineering, CSAE 2011 1 643 - 649 2011

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DOI： 10.1109/CSAE.2011.5953301
Cryptanalysis on an image scrambling encryption scheme based on pixel bit

Liang Zhao, Avishek Adhikari, Di Xiao, Kouichi Sakurai

9th International Workshop on Digital Watermarking, IWDW 2010 Digital Watermarking - 9th International Workshop, IWDW 2010, Revised Selected Papers 6526 LNCS 45 - 59 2011

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DOI： 10.1007/978-3-642-18405-5-5
Classification on attacks in wireless ad hoc networks A game theoretic view

Xiaojuan Liao, Dong Hao, Kouichi Sakurai

7th International Conference on Networked Computing and Advanced Information Management, NCM 2011 Proceedings - 7th International Conference on Networked Computing and Advanced Information Management, NCM 2011 144 - 149 2011

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An efficient key generation method in audio zero-watermarking

Rimba Whidiana Ciptasari, Aulia Fajar, Fazmah Arif Yulianto, Kouichi Sakurai

7th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIHMSP 2011 Proceedings - 7th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIHMSP 2011 336 - 339 2011

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DOI： 10.1109/IIHMSP.2011.63
Achieving cooperative detection against Sybil attack in wireless ad hoc networks A game theoretic approach

Xiaojuan Liao, Dong Hao, Kouichi Sakurai

17th Asia Pacific Conference on Communications, APCC 2011 17th Asia Pacific Conference on Communications, APCC 2011 806 - 811 2011

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DOI： 10.1109/APCC.2011.6152918
A study of communication route selection considering route security

Fumiharu Etoh, Yoshiaki Hori, Kouichi Sakurai

11th IEEE/IPSJ International Symposium on Applications and the Internet, SAINT 2011 Proceedings - 11th IEEE/IPSJ International Symposium on Applications and the Internet, SAINT 2011 360 - 365 2011

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DOI： 10.1109/SAINT.2011.69
A robust and compression-combined digital image encryption method based on compressive sensing

Rong Huang, Kouichi Sakurai

7th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIHMSP 2011 Proceedings - 7th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIHMSP 2011 105 - 108 2011

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DOI： 10.1109/IIHMSP.2011.53
A new scrambling evaluation scheme based on spatial distribution entropy and centroid difference of bit-plane

Liang Zhao, Avishek Adhikari, Kouichi Sakurai

9th International Workshop on Digital Watermarking, IWDW 2010 Digital Watermarking - 9th International Workshop, IWDW 2010, Revised Selected Papers 6526 LNCS 29 - 44 2011

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DOI： 10.1007/978-3-642-18405-5-4
Adaptive and composable non-committing encryptions

Huafei Zhu, Tadashi Araragi, Takashi Nishide, Kouichi Sakurai

15th Australasian Conference on Information Security and Privacy, ACISP 2010 Information Security and Privacy - 15th Australasian Conference, ACISP 2010, Proceedings 6168 LNCS 135 - 144 2010.12

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DOI： 10.1007/978-3-642-14081-5_9
Improved subset difference method with ternary tree Reviewed

Kazuhide Fukushima, Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E93-A ( 11 ) 2034 - 2044 2010.11

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DOI： 10.1587/transfun.E93.A.2034
Towards a fairness multimedia transmission using layered-based multicast protocol Reviewed

Heru Sukocof, Yoshiaki Hori, Hendrawan, Kouichi Sakurai

IEICE Transactions on Information and Systems E93-D ( 11 ) 2953 - 2961 2010.11

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DOI： 10.1587/transinf.E93.D.2953
Model-based intrusion detection by abstract interpretation

Jingyu Hua, Takashi Nishide, Kouichi Sakurai

2010 10th Annual International Symposium on Applications and the Internet, SAINT 2010 Proceedings - 2010 10th Annual International Symposium on Applications and the Internet, SAINT 2010 359 - 362 2010.11

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DOI： 10.1109/SAINT.2010.107
Preserving integrity and confidentiality of a directed acyclic graph model of provenance

Amril Syalim, Takashi Nishide, Kouichi Sakurai

24th Annual IFIP WG 11.3 Working Conference on Data and Applications Security and Privacy Data and Applications Security and Privacy XXIV - 24th Annual IFIP WG 11.3 Working Conference, Proceedings 6166 LNCS 311 - 318 2010.10

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DOI： 10.1007/978-3-642-13739-6_22
Modeling and containment of search worms targeting web applications

Jingyu Hua, Kouichi Sakurai

7th GI International Conference on Detection of Intrusions and Malware and Vulnerability Assessment, DIMVA 2010 Detection of Intrusions and Malware, and Vulnerability Assessment - 7th International Conference, DIMVA 2010, Proceedings 6201 LNCS 183 - 199 2010.8

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DOI： 10.1007/978-3-642-14215-4_11
Mechanized analysis of verifiable multi-secret sharing in the appliedPi-calculus Reviewed

Hui Zhao, Mingchu Li, Kouichi Sakurai, Yizhi Ren

ICIC Express Letters 4 ( 3 ) 1053 - 1058 2010.6

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A behavior based malware detection scheme for avoiding false positive

Yoshiro Fukushima, Akihiro Sakai, Yoshiaki Hori, Kouichi Sakurai

2010 6th IEEE Workshop on Secure Network Protocols, NPSec 2010 2010 6th IEEE Workshop on Secure Network Protocols, NPSec 2010 79 - 84 2010

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DOI： 10.1109/NPSEC.2010.5634444
Universally composable non-committing encryptions in the presence of adaptive adversaries

Huafei Zhu, Tadashi Araragi, Takashi Nishide, Kouichi Sakurai

International Conference on Security and Cryptography, SECRYPT 2010 SECRYPT 2010 - Proceedings of the International Conference on Security and Cryptography 389 - 398 2010

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Study of log file dispersion management method

Fumiharu Etoh, Kenichi Takahashi, Yoshiaki Hori, Kouichi Sakurai

2010 10th Annual International Symposium on Applications and the Internet, SAINT 2010 Proceedings - 2010 10th Annual International Symposium on Applications and the Internet, SAINT 2010 371 - 374 2010

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DOI： 10.1109/SAINT.2010.104
Special section on trust, security and privacy for pervasive applications Reviewed

Guojun Wang, Laurence T. Yang, Kouichi Sakurai

IEICE Transactions on Information and Systems E93-D ( 3 ) 409 - 410 2010

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SPSE A flexible QoS-based service scheduling algorithm for service-oriented Grid

Laiping Zhao, Yizhi Ren, Mingchu Li, Kouichi Sakurai

2010 IEEE International Symposium on Parallel and Distributed Processing, Workshops and Phd Forum, IPDPSW 2010 Proceedings of the 2010 IEEE International Symposium on Parallel and Distributed Processing, Workshops and Phd Forum, IPDPSW 2010 2010

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DOI： 10.1109/IPDPSW.2010.5470920
Implementation and evaluation of bot detection scheme based on data transmission intervals

Seiichiro Mizoguchi, Yuji Kugisaki, Yoshiaki Kasahara, Yoshiaki Hori, Kouichi Sakurai

2010 6th IEEE Workshop on Secure Network Protocols, NPSec 2010 2010 6th IEEE Workshop on Secure Network Protocols, NPSec 2010 73 - 78 2010

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DOI： 10.1109/NPSEC.2010.5634446
Image encryption design based on multi-dimensional matrix map and partitioning substitution and diffusion-integration substitution network structure

Liang Zhao, Di Xiao, Kouichi Sakurai

2010 International Conference in Information Science and Applications, ICISA 2010 2010 International Conference on Information Science and Applications, ICISA 2010 2010

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DOI： 10.1109/ICISA.2010.5480269
Fault-Tolerant Scheduling with Dynamic Number of Replicas in Heterogeneous Systems

Laiping Zhao, Yizhi Ren, Yang Xiang, Kouichi Sakurai

2010 12th IEEE International Conference on High Performance Computing and Communications, HPCC 2010 Proceedings - 2010 12th IEEE International Conference on High Performance Computing and Communications, HPCC 2010 434 - 441 2010

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DOI： 10.1109/HPCC.2010.72
ESS-FH Enhanced security scheme for fast handover in hierarchical mobile IPv6 Reviewed

Ilsun You, Jong Hyouk Lee, Kouichi Sakurai, Yoshiaki Hori

IEICE Transactions on Information and Systems E93-D ( 5 ) 1096 - 1105 2010

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DOI： 10.1587/transinf.E93.D.1096
Darknet monitoring on real-operated networks

Seiichiro Mizoguchi, Yoshiro Fukushima, Yoshiaki Kasahara, Yoshiaki Hori, Kouichi Sakurai

5th International Conference on Broadband Wireless Computing, Communication and Applications, BWCCA 2010 Proceedings - 2010 International Conference on Broadband, Wireless Computing Communication and Applications, BWCCA 2010 278 - 285 2010

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DOI： 10.1109/BWCCA.2010.82
Behavior control based on dynamic code translation

Akihiro Sakai, Yoshiaki Hori, Kouichi Sakurai

2010 10th Annual International Symposium on Applications and the Internet, SAINT 2010 Proceedings - 2010 10th Annual International Symposium on Applications and the Internet, SAINT 2010 375 - 378 2010

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DOI： 10.1109/SAINT.2010.103
Analysis of existing privacy-preserving protocols in domain name system Reviewed

Fangming Zhao, Yoshiaki Hori, Kouichi Sakurai

IEICE Transactions on Information and Systems E93-D ( 5 ) 1031 - 1043 2010

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DOI： 10.1587/transinf.E93.D.1031
Adaptive and composable non-interactive string-commitment protocols

Huafei Zhu, Tadashi Araragi, Takashi Nishide, Kouichi Sakurai

International Conference on Security and Cryptography, SECRYPT 2010 SECRYPT 2010 - Proceedings of the International Conference on Security and Cryptography 354 - 361 2010

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A design of history based traffic filtering with probabilistic packet marking against DoS attacks

Tadashi Kiuchi, Yoshiaki Hori, Kouichi Sakurai

2010 10th Annual International Symposium on Applications and the Internet, SAINT 2010 Proceedings - 2010 10th Annual International Symposium on Applications and the Internet, SAINT 2010 261 - 264 2010

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DOI： 10.1109/SAINT.2010.44
Efficient intrusion detection based on static analysis and stack walks

Jingyu Hua, Mingchu Li, Kouichi Sakurai, Yizhi Ren

4th International Workshop on Security, IWSEC 2009 Advances in Information and Computer Security - 4th International Workshop on Security, IWSEC 2009, Proceedings 5824 LNCS 158 - 173 2009.12

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DOI： 10.1007/978-3-642-04846-3_11
Enhancing cooperative behavior for online reputation systems by group selection

Yizhi Ren, Mingchu Li, Yongrui Cui, Cheng Guo, Kouichi Sakurai

Symposia and Workshops on Ubiquitous, Autonomic and Trusted Computing in Conjunction with the UIC'09 and ATC'09 Conferences, UIC-ATC 2009 UIC-ATC 2009 - Symposia and Workshops on Ubiquitous, Autonomic and Trusted Computing in Conjunction with the UIC'09 and ATC'09 Conferences 568 - 573 2009.12

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DOI： 10.1109/UIC-ATC.2009.81
Formal verification for access control in web information sharing system

Akihiro Sakai, Yoshiaki Hori, Kouichi Sakurai

3rd International Conference on Information Security and Assurance, ISA 2009 Advances in Information Security and Assurance - Third International Conference and Workshops, ISA 2009, Proceedings 5576 LNCS 80 - 89 2009.11

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DOI： 10.1007/978-3-642-02617-1_9
Ternary subset difference method and its quantitative analysis

Kazuhide Fukushima, Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai

9th International Workshop on Information Security Applications, WISA 2008 Information Security Applications - 9th International Workshop, WISA 2008, Revised Selected Papers 5379 LNCS 225 - 239 2009.11

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DOI： 10.1007/978-3-642-00306-6_17
Grouping provenance information to improve efficiency of access Control

Amril Syalim, Yoshiaki Hori, Kouichi Sakurai

3rd International Conference on Information Security and Assurance, ISA 2009 Advances in Information Security and Assurance - Third International Conference and Workshops, ISA 2009, Proceedings 5576 LNCS 51 - 59 2009.11

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DOI： 10.1007/978-3-642-02617-1_6
An Enhanced Security Protocol for Fast Mobile IPv6 Reviewed International journal

YOU Ilsun, SAKURAI Kouichi, HORI Yoshiaki

IEICE Transactions on Information and Systems 2009.10

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The 3rd International workshop on intelligent, mobile and internet services in ubiquitous computing (IMIS 2009) Welcome message from IMIS 2009 organizers Reviewed

Kouichi Sakurai, Ilsun You, Bonam Kim, Feilong Tang

Proceedings of the International Conference on Complex, Intelligent and Software Intensive Systems, CISIS 2009 2009.10

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DOI： 10.1109/CISIS.2009.212
個別アドレス発行によるメーリングリストへのスパムメール削減方式の提案と評価 Reviewed International journal

高橋健一, 境顕宏, 堀良彰, 櫻井幸一

情報処理学会論文誌（IPSJ Journal） 2009.9

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Importance of data standardization in privacy-preserving k-means clustering

Chunhua Su, Justin Zhan, Kouichi Sakurai

International Workshops on Database Systems for Advanced Applications, DASFAA 2009: BenchmarX, MCIS, WDPP, PPDA, MBC, PhD Database Systems for Advanced Applications - DASFAA 2009 International Workshops BenchmarX, MCIS, WDPP, PPDA, MBC, PhD 5667 LNCS 276 - 286 2009.9

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DOI： 10.1007/978-3-642-04205-8_23
Distributed Noise Generation for Density Estimation Based Clustering without Trusted Third Party Reviewed International journal

SU Chunhua, BAO Feng, ZHOU Jianying, TAKAGI Tsuyoshi, SAKURAI Kouich

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 2009.8

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Distributed Noise Generation for Density Estimation Based Clustering without Trusted Third Party Reviewed

Chunhua Su, Feng Bao, Jianying Zhou, Tsuyoshi Takagi, Kouichi Sakurai

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E92A ( 8 ) 1868 - 1871 2009.8

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DOI： 10.1587/transfun.E92.A.1868
Design and implementation of security mechanisms for a hierarchical community-based multi-agent system

Kenichi Takahashi, Yoshiki Mitsuyuki, Tsunenori Mine, Kouichi Sakurai, Makoto Amamiya

10th Pacific Rim International Conference on Multi-Agents, PRIMA 2007 Agent Computing and Multi-Agent Systems - 10th Pacific Rim International Conference on Multi-Agents, PRIMA 2007, Revised Papers 5044 LNAI 134 - 145 2009.7

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DOI： 10.1007/978-3-642-01639-4_12
Reconsidering data logging in light of digital forensics

Bin Hui Chou, Kenichi Takahashi, Yoshiaki Hori, Kouichi Sakurai

Advances in Information Security and Its Application Third International Conference, ISA 2009, Proceedings 36 111 - 118 2009.7

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DOI： 10.1007/978-3-642-02633-1_15
Improving the quality of protection of web application firewalls by a simplified taxonomy of web attacks

Yi Han, Akihiro Sakai, Yoshiaki Hori, Kouichi Sakurai

Advances in Information Security and Its Application Third International Conference, ISA 2009, Proceedings 36 105 - 110 2009.7

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DOI： 10.1007/978-3-642-02633-1_14
A Security Analysis on Kempf-Koodlis Security Scheme for Fast Mobile IPv6 Reviewed International journal

YOU Ilsun, SAKURAI Kouichi, HORI Yoshiaki

IEICE Transactions on Communications 2009.6

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A security analysis on Kempf-Koodli's security scheme for Fast Mobile IPv6 Reviewed

Ilsun You, Kouichi Sakurai, Yoshiaki Hori

IEICE Transactions on Communications E92-B ( 6 ) 2287 - 2290 2009.6

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DOI： 10.1587/transcom.E92.B.2287
Enhancing Cooperative Behavior for P2P Reputation Systems by Group Selection Reviewed International journal

Yizhi Ren, Mingchu Li, Yongrui Cui, Cheng Guo and Kouichi Sakurai

RIMS Kokyuroku 2009.5

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An Adaptive Reputation-Based Algorithm for Grid Virtual Organization Formation Reviewed International journal

Yongrui CUI, Mingchu LI, Yizhi REN, Kouichi SAKURAI

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 2009.5

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Security and Correctness Analysis on Privacy-Preserving k-Means Clustering Schemes Reviewed International journal

SU Chunhua, BAO Feng, ZHOU Jianying, TAKAGI Tsuyoshi, SAKURAI Kouichi

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 2009.5

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Security and Correctness Analysis on Privacy-Preserving k-Means Clustering Schemes Reviewed

Chunhua Su, Feng Bao, Jianying Zhou, Tsuyoshi Takagi, Kouichi Sakurai

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E92A ( 4 ) 1246 - 1250 2009.4

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DOI： 10.1587/transfun.E92.A.1246
A new secret sharing scheme based on the multi-dealer Reviewed

Cheng Guo, Mingchu Li, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E92-A ( 5 ) 1373 - 1378 2009.1

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DOI： 10.1587/transfun.E92.A.1373
A signature scheme associated with universal re-signcryption

Kohei Tatara, Kouichi Sakurai

International Conference on Availability, Reliability and Security, ARES 2009 Proceedings - International Conference on Availability, Reliability and Security, ARES 2009 780 - 785 2009

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DOI： 10.1109/ARES.2009.104
Security analysis for P2P routing protocols

Tatsuro Fujii, Yizhi Ren, Yoshiaki Hori, Kouichi Sakurai

International Conference on Availability, Reliability and Security, ARES 2009 Proceedings - International Conference on Availability, Reliability and Security, ARES 2009 899 - 904 2009

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DOI： 10.1109/ARES.2009.82
Secrecy capacity of wireless LAN

Ryuzou Nishi, Yoshiaki Hori, Kouichi Sakurai

International Conference on Availability, Reliability and Security, ARES 2009 Proceedings - International Conference on Availability, Reliability and Security, ARES 2009 905 - 910 2009

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DOI： 10.1109/ARES.2009.91
Polymorphic worm detection by analyzing maximum length of instruction sequence in network packets

Kohei Tatara, Yoshiaki Hori, Kouichi Sakurai

International Conference on Availability, Reliability and Security, ARES 2009 Proceedings - International Conference on Availability, Reliability and Security, ARES 2009 972 - 977 2009

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DOI： 10.1109/ARES.2009.103
Modeling security bridge certificate authority architecture Reviewed

Yizhi Ren, Mingchu Li, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E92-A ( 6 ) 1544 - 1547 2009

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DOI： 10.1587/transfun.E92.A.1544
Message from the trustcom 2009 symposium chairs Reviewed

Guojun Wang, Peter Mueller, Kouichi Sakurai, Maria S. Perez-Hernandez

Proceedings - 12th IEEE International Conference on Computational Science and Engineering, CSE 2009 2 2009

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DOI： 10.1109/CSE.2009.524
Foreword Special section on information and communication system security Reviewed

Kouichi Sakurai

IEICE Transactions on Information and Systems E92-D ( 5 ) 765 2009

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Flow traffic classification with support vector machine by using payload length

Masayoshi Kohara, Yoshiaki Hori, Kouichi Sakurai, Heejo Lee, Jae Cheol Ryou

2009 2nd International Conference on Computer Science and Its Applications, CSA 2009 Proceedings of the 2009 2nd International Conference on Computer Science and Its Applications, CSA 2009 2009

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DOI： 10.1109/CSA.2009.5404180
Distributed noise generation for density estimation based clustering without trusted third party Reviewed

Chunhua Su, Feng Bao, Jianying Zhou, Tsuyoshi Takagi, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E92-A ( 8 ) 1868 - 1871 2009

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DOI： 10.1587/transfun.E92.A.1868
Design and object-oriented implementation of an intelligence entity sharing pool

Runhe Huang, Jianhua Ma, Kenichi Takahashi, Kouichi Sakurai

2009 WRI Global Congress on Intelligent Systems, GCIS 2009 Proceedings of the 2009 WRI Global Congress on Intelligent Systems, GCIS 2009 2 583 - 587 2009

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DOI： 10.1109/GCIS.2009.269
Comparison of risk analysis methods Mehari, magerit, NIST800-30 and microsoft's security management guide

Amril Syalim, Yoshiaki Hori, Kouichi Sakurai

International Conference on Availability, Reliability and Security, ARES 2009 Proceedings - International Conference on Availability, Reliability and Security, ARES 2009 726 - 731 2009

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DOI： 10.1109/ARES.2009.75
Comments on Kang-Park's security scheme for fast handover in hierarchical mobile IPv6

Ilsun You, Kouichi Sakurai, Yoshiaki Hori

4th International Conference on Frontier of Computer Science and Technology, FCST 2009 4th International Conference on Frontier of Computer Science and Technology, FCST 2009 351 - 355 2009

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DOI： 10.1109/FCST.2009.75
An enhanced security protocol for fast mobile IPv6 Reviewed

Ilsun You, Kouichi Sakurai, Yoshiaki Hori

IEICE Transactions on Information and Systems E92-D ( 10 ) 1979 - 1982 2009

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DOI： 10.1587/transinf.E92.D.1979
An adaptive reputation-based algorithm for grid virtual organization formation Reviewed

Yongrui Cui, Mingchu Li, Yizhi Ren, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E92-A ( 5 ) 1339 - 1346 2009

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DOI： 10.1587/transfun.E92.A.1339
Security and correctness analysis on privacy-preserving k-means clustering schemes Reviewed

Chunhua Su, Feng Bao, Jianying Zhou, Tsuyoshi Takagi, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E92-A ( 4 ) 1246 - 1250 2009

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DOI： 10.1587/transfun.E92.A.1246
The optimal choice by resource consumers in Grid market

Laiping Zhao, Mingchu Li, Weifeng Sun, Kouichi Sakurai, Yizhi Ren

Symposia and Workshops on Ubiquitous, Autonomic and Trusted Computing in Conjunction with the UIC'09 and ATC'09 Conferences, UIC-ATC 2009 UIC-ATC 2009 - Symposia and Workshops on Ubiquitous, Autonomic and Trusted Computing in Conjunction with the UIC'09 and ATC'09 Conferences 580 - 585 2009

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DOI： 10.1109/UIC-ATC.2009.75
Trust similarity measure in trust model for P2P networks

Yizhi Ren, Mingchu Li, Cheng Guo, Yongrui Cui, Kouichi Sakurai

5th International Conference on Embedded and Ubiquitous Computing, EUC 2008 Proceedings of The 5th International Conference on Embedded and Ubiquitous Computing, EUC 2008 2 107 - 112 2008.12

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DOI： 10.1109/EUC.2008.137
A secure virtualized logging scheme for digital forensics in comparison with kernel module approach

Bin Hui Chou, Kohei Tatara, Taketoshi Sakuraba, Yoshiaki Hori, Kouichi Sakurai

2nd International Conference on Information Security and Assurance, ISA 2008 Proceedings of the 2nd International Conference on Information Security and Assurance, ISA 2008 421 - 426 2008.9

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DOI： 10.1109/ISA.2008.96
Key distribution scheme using matched filter resistant against DoS attack

Ryuzou Nishi, Yoshiaki Hori, Kouichi Sakurai

22nd International Conference on Advanced Information Networking and Applications Workshops/Symposia, AINA 2008 Proceedings - 22nd International Conference on Advanced Information Networking and Applications Workshops/Symposia, AINA 2008 1534 - 1539 2008.9

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DOI： 10.1109/WAINA.2008.180
IMIS 2008 message from the workshop organizers MUE 2008 Reviewed

2008 International Conference on Multimedia and Ubiquitous Engineering, MUE 2008 Proceedings - 2008 International Conference on Multimedia and Ubiquitous Engineering, MUE 2008 2008.9

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DOI： 10.1109/MUE.2008.7
Reliable key distribution scheme for lossy channels Reviewed

Ryuzou Nishi, Yoshiaki Hori, Kouichi Sakurai

IEICE Transactions on Information and Systems E91-D ( 5 ) 1485 - 1488 2008.5

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DOI： 10.1093/ietisy/e91-d.5.1485
Characterizing economic and social properties of trust and reputation systems in P2P environment Reviewed

Yu Feng Wang, Yoshiaki Hori, Kouichi Sakurai

Journal of Computer Science and Technology 23 ( 1 ) 129 - 140 2008.1

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DOI： 10.1007/s11390-008-9118-y
Analysis of program obfuscation schemes with variable encoding technique Reviewed

Kazuhide Fukushima, Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E91A ( 1 ) 316 - 329 2008.1

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DOI： 10.1093/ietfec/e91-a.1.316
Optimization of group key management structure with a client join-leave mechanism Reviewed

Kazuhide Fukushima, Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai

Journal of Information Processing 16 130 - 141 2008.1

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DOI： 10.2197/ipsjjip.16.130
Toward a scalable visualization system for network traffic monitoring Reviewed

IEICE Transactions on Information and Systems E91-D ( 5 ) 1300 - 1310 2008.1

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DOI： 10.1093/ietisy/e91-d.5.1300
A distributed privacy-preserving association rules mining scheme using frequent-pattern tree

Chunhua Su, Kouichi Sakurai

4th International Conference on Advanced Data Mining and Applications, ADMA 2008 Advanced Data Mining and Applications - 4th International Conference, ADMA 2008, Proceedings 5139 LNAI 170 - 181 2008

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DOI： 10.1007/978-3-540-88192-6-17
Definition of security practices in security management part of security level management model Reviewed

Tai Hoon Kim, Kouichi Sakurai

International Journal of Security and its Applications 2 ( 1 ) 63 - 71 2008

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Analysis of program obfuscation schemes with variable encoding technique Reviewed

Kazuhide Fukushima, Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E91-A ( 1 ) 316 - 329 2008

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DOI： 10.1093/ietfec/e91-a.1.316
Achieving evenhandedness in certified email system for contract signing Reviewed

Kenji Imamoto, Jianying Zhou, Kouichi Sakurai

International Journal of Information Security 7 ( 6 ) 383 - 394 2008

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DOI： 10.1007/s10207-008-0056-z
A study on security level management model description Reviewed

Tai Hoon Kim, Kouichi Sakurai

International Journal of Multimedia and Ubiquitous Engineering 3 ( 1 ) 87 - 94 2008

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A new scheme for distributed density estimation based privacy-preserving clustering

Chunhua Su, Feng Bao, Jianying Zhou, Tsuyoshi Takagi, Kouichi Sakurai

3rd International Conference on Availability, Security, and Reliability, ARES 2008 ARES 2008 - 3rd International Conference on Availability, Security, and Reliability, Proceedings 112 - 119 2008

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DOI： 10.1109/ARES.2008.129
A framework for user privacy protection using trusted programs Reviewed

Kenichi Takahashi, Zhaoyu Liu, Kouichi Sakurai, Makoto Amamiya

International Journal of Security and its Applications 1 ( 2 ) 59 - 70 2007.12

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Efficient verifier-based password-authenticated key exchange in the three-party setting Reviewed

Jeong Ok Kwon, Ik Rae Jeong, Kouichi Sakurai, Dong Hoon Lee

Computer Standards and Interfaces 29 ( 5 ) 513 - 520 2007.7

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DOI： 10.1016/j.csi.2006.12.002
A proposal of key management scheme and its operation using Anonymous biometrics on ID-based infrastructure Reviewed

Akitoshi Izumi, Yoshifumi Ueshige, Kouichi Sakurai

International Journal of Security and its Applications 1 ( 1 ) 83 - 94 2007.1

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Special section on cryptography and information security Reviewed

Masakatu Morii, Shiho Moriai, Goichiro Hanaoka, Toru Akishita, Tetsuya Izu, Tetsu Iwata, Koji Okada, Toshinobu Kaneko, Hiroaki Kikuchi, Kwangjo Kim, Shinsaku Kiyomoto, Noboru Kunthiro, Hiroki Koga, Kazukuni Kobara, Ryuichi Sakai, Kouichi Sakurai, Kazue Sako, Takashi Satoh, Akira Shiozaki, Hiroki Shizuya, Tsuyoshi Takagi, Mitsuru Tada, Keisuke Tanaka, Hiroshi Doi, Toru Nakanishi, Shoichi Hirose, Eiichiro Fujisaki, Soichi Furuya, Mitsuru Matsui, Natsume Matsuzaki, Tsutomu Matsumoto, Atsuko Miyaji, Maid Yoshida

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E90-A ( 1 ) 2007.1

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DOI： 10.1093/ietfec/e90-a.1.1
Privacy-preservation techniques in data mining

Chunhua Su, Jianying Zhou, Feng Bao, Guilin Wang, Kouichi Sakurai

Digital Privacy Theory, Technologies, and Practices 187 - 226 2007.1

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On effectiveness of clock control in stream ciphers Reviewed

Shinsaku Kiyomoto, Kazuhide Fukushima, Toshiaki Tanaka, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E90-A ( 9 ) 1780 - 1787 2007.1

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DOI： 10.1093/ietfec/e90-a.9.1780
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) Preface Reviewed

Topics in Cryptology - CT-RSA 2006: The Cryptographers' Track at the RSA Conference 2006, Proceedings Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 3960 LNCS 2006.7

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Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) Preface Reviewed

Laurence T. Yang, Hai Jin, Jianhua Ma, Theo Ungerer, David Ogle, Manish Parashar, Kouichi Sakurai

Thrid International Conference on Autonomic and Trusted Computing, ATC 2006 Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 4158 LNCS 2006.1

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Simple power analysis on fast modular reduction with generalized Mersenne prime for elliptic curve cryptosystems Reviewed

Yasuyuki Sakai, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E89-A ( 1 ) 231 - 237 2006.1

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DOI： 10.1093/ietfec/e89-a.1.231
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) Preface Reviewed

Yuko Murayama, Shinichi Kawamura, Hiroshi Yoshiura, Kouichi Sakurai, Kai Rannenberg

Lecture Notes in Computer Science 4266 LNCS 2006

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Security protocol for IMT-2000-based contents service Reviewed

Sang Soo Yeo, Deok Gyu Lee, Kouichi Sakurai

International Journal of Multimedia and Ubiquitous Engineering 1 ( 4 ) 11 - 20 2006

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Security countermeasure design for information systems by using block model Reviewed

Tai Hoon Kim, Kouichi Sakurai

International Journal of Multimedia and Ubiquitous Engineering 1 ( 2 ) 30 - 33 2006

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Experimental analysis of guess-and-determine attacks on clock-controlled stream ciphers Reviewed

Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E88-A ( 10 ) 2778 - 2791 2005.10

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DOI： 10.1093/ietfec/e88-a.10.2778
Analysis and comparison of cryptographic techniques in e-voting and e-auction Reviewed

Yong Sork Her, Kenji Imamoto, Kouichi Sakurai

Research Reports on Information Science and Electrical Engineering of Kyushu University 10 ( 2 ) 91 - 96 2005.9

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Design and analysis of Diffie-Hellman-based key exchange using one-time ID by SVO logic Reviewed

Kenji Imamoto, Kouichi Sakurai

Electronic Notes in Theoretical Computer Science 135 ( 1 ) 79 - 94 2005.7

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DOI： 10.1016/j.entcs.2005.06.003
A collaborative role-based access control for trusted operating systems in distributed environment Reviewed

Hyung Chan Kim, R. S. Ramakrishna, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E88-A ( 1 ) 270 - 279 2005.1

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DOI： 10.1093/ietfec/E88-A.1.270
Special section on cryptography and information security Reviewed

Tetsuya Izu, Tetsu Iwata, Shiho Moriai, Tomoyuki Asano, Toshinobu Kaneko, Kwangjo Kim, Noboru Kunihiro, Hidenori Kuwakado, Hiroki Koga, Kazukuni Kobara, Ryuichi Sakai, Kouichi Sakurai, Takashi Satoh, Akira Shiozaki, Hideo Shimizu, Mitsuru Tada, Tsuyoshi Takagi, Keisuke Tanaka, Toshiaki Tanaka, Yukiyasu Tsunoo, Hiroshi Doi, Eiichiro Fujisaki, Soichi Furuya, Mitsuru Matsui, Tsutomu Matsumoto, Natsume Matsuzaki, Masahiro Mambo, Atsuko Miyaji, Yuko Murayama, Maki Yoshida, Hajime Watanabe, Akira Hayashi

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E88-A ( 1 ) 2005.1

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DOI： 10.1093/ietfec/E88-A.1.1
Proposal and analysis of a distributed online certificate status protocol with low communication cost Reviewed

Satoshi Koga, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E88-A ( 1 ) 247 - 254 2005.1

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DOI： 10.1093/ietfec/E88-A.1.247
Procedural constraints in the extended RBAC and the coloured Petri net modeling Reviewed

Wook Shin, Jeong Gun Lee, Hong Kook Klm, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E88-A ( 1 ) 327 - 330 2005.1

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DOI： 10.1093/ietfec/E88-A.1.327
On the vulnerability of exponent recodings for the exponentiation against side channel attacks Reviewed

Yasuyuki Sakai, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E88-A ( 1 ) 154 - 160 2005.1

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DOI： 10.1093/ietfec/E88-A.1.154
On the pseudorandomness of a modification of KASUMI type permutations Reviewed

Wonil Lee, Kouichi Sakurai, Seokhie Hong, Sangjin Lee

Lecture Notes in Computer Science 3506 313 - 329 2005

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The improved risk analysis mechanism in the practical risk analysis system Reviewed

SangCheol Hwang, NamHoon Lee, Kouichi Sakurai, GungGil Park, JaeCheol Ryou

Unknown Journal 3391 835 - 842 2005

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Side channel cryptanalysis on XTR public key cryptosystem Reviewed

Dong Guk Han, Tetsuya Izu, Jongin Lim, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E88-A ( 5 ) 1214 - 1223 2005

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DOI： 10.1093/ietfec/e88-a.5.1214
PGV-style block-cipher-based hash families and black-box analysis Reviewed

Wonil Lee, Mridul Nandi, Palash Sarkar, Donghoon Chang, Sangjin Lee, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E88-A ( 1 ) 39 - 48 2005

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DOI： 10.1093/ietfec/E88-A.1.39
A DRM framework for secure distribution of mobile contents Reviewed

Kwon Il Lee, Kouichi Sakurai, Jun Seok Lee, Jae Cheol Ryou

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 3090 905 - 914 2004.12

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Pre-production methods of a response to certificates with the common status - Design and theoretical evaluation Reviewed

Satoshi Koga, Jae Cheol Ryou, Kouichi Sakurai

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 3093 85 - 97 2004.12

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Modified power-analysis attacks on XTR and an efficient countermeasure Reviewed

Dong Guk Han, Tetsuya Izu, Jongin Lim, Kouichi Sakurai

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 3269 305 - 317 2004.12

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A software fingerprinting scheme for java using classfiles obfuscation Reviewed

Kazuhide Fukushima, Kouichi Sakurai

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2908 303 - 316 2004.12

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A generalization of PGV-hash functions and security analysis in black-box model Reviewed

Wonil Lee, Mridul Nandi, Palash Sarkar, Donghoon Chang, Sangjin Lee, Kouichi Sakurai

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 3108 212 - 223 2004.12

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A distributed online certificate status protocol with a single public key Reviewed

Satoshi Koga, Kouichi Sakurai

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2947 389 - 401 2004.12

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チャレンジ-レスポンスとベイジアンフィルタを併用した迷惑メール対策の提案 Reviewed

岩永学, 田端利宏, 櫻井幸一

情報処理学会論文誌 2004.8

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普遍再暗号化によるRFIDタグのプライバシ保護の実現 Reviewed

齊藤純一郎, 櫻井幸一

情報処理学会論文誌 2004.8

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Timing Attacks against a Parallelized RSA Implementation Reviewed

Yasuyuki Sakai and Kouichi Sakurai

2004.8

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On Security of XTR Public Key Cryptosystems Against Side Channel Attacks Reviewed International journal

Dong-Guk Han, Jongin Lim, Kouichi Sakurai

Proc. ACISP 2004 2004.7

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Pseudorandomness of SPN-Type Transformations Reviewed International journal

Wonil Lee, Mridul Nandi, Palash Sarkar, Donghoon Chang, Sangjin Lee, Kouichi Sakura

Proc. ACISP 2004 2004.7

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Pre-production Methods of a Response to Certificates with the Common Status - Design and Theoretical Evaluation Reviewed International journal

Satoshi Koga, Jae-Cheol Ryou, Kouichi Sakurai

Proc. EuroPKI 2004 3093 85 - 97 2004.6

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Special section on Discrete Mathematics and its applications Reviewed

Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E87-A ( 5 ) 977 2004.5

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A Distributed Online Certificate Status Protocol with a Single Public Key Reviewed International journal

Satoshi Koga, Kouichi SAKURAI

Proc. Public Key Cryptography 2004 2947 389 - 401 2004.3

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A Design of Diffie-Hellman Based Key Exchange Using One-time ID in Pre-shared Key Model Reviewed International journal

Kenji IMAMOTO, Kouichi SAKURAI

Proc. AINA (1) 2004 327 - 332 2004.3

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A Merging Method of Certification Authorities Without Using Cross-Certifications Reviewed International journal

Satoshi Koga, Kouichi SAKURAI

Proc. AINA (2) 2004 174 - 177 2004.3

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検証エージェントを用いたモバイルエージェントのためのリアルタイム改竄検出システムの提案 Reviewed

小手川祐樹, 櫻井幸一

情報処理学会論文誌 2004.2

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A New Attack with Side Channel Leakage During Exponent Recoding Computations Reviewed International journal

Yasuyuki Sakai, Kouichi SAKURAI

Proc. CHES 2004 3156 298 - 311 2004.1

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Analysis and Design for Private Message Board Systems Reviewed

Kenji Imamotoh, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E87-A ( 1 ) 204 - 211 2004.1

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Analysis and Design for Private Message Board Systems Reviewed International journal

Kenji IMAMOTO, Kouichi SAKURAI

IEICE Trans. Fundamentals E87A ( 1 ) 204 - 211 2004.1

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A new attack with side channel leakage during exponent recoding computations Reviewed

Yasuyuki Sakai, Kouichi Sakurai

Lecture Notes in Computer Science 3156 298 - 311 2004

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On security of XTR public key cryptosystems against side channel attacks Reviewed

Dong Guk Han, Jongin Lim, Kouichi Sakurai

Lecture Notes in Computer Science 3108 454 - 465 2004

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Enhancing privacy of universal re-encryption scheme for RFID tags Reviewed

Junichiro Saito, Jae Cheol Ryou, Kouichi Sakurai

Lecture Notes in Computer Science 3207 879 - 890 2004

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On the Security of SELinux with a Simplified Policy Reviewed International journal

Katsuya SUEYASU, Toshihiro TABATA, Kouichi SAKURAI

Proc. of the IASTED International Conference on Communication 2003.12

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Single-path authenticated-encryption scheme based on universal hashing Reviewed

Soichi Furuya, Kouichi Sakurai

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2595 94 - 109 2003.12

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Fast multi-scalar multiplication methods on elliptic curves with precomputation strategy using montgomery trick Reviewed

Katsuyuki Okeya, Kouichi Sakurai

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2523 564 - 578 2003.12

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Does it need trusted third party? Design of buyer-seller watermarking protocol without trusted third party Reviewed

Jae Gwi Choi, Kouichi Sakurai, Ji Hwan Park

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2846 265 - 279 2003.12

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A reject timing attack on an IND-CCA2 public-key cryptosystem Reviewed

Kouichi Sakurai, Tsuyoshi Takagi

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2587 359 - 373 2003.12

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Evaluation of Anti-spam Method Combining Bayesian Filtering and Strong Challenge and Response Reviewed International journal

Manabu IWANAGA, Toshihiro TABATA, Kouichi SAKURAI

Proc. of IASTED Int. Conf. on Communication, Network, and Information Security (CNIS 2003) 2003.12

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Does It Need Trusted Third Party? Design of Buyer-Seller Watermarking Protocol without Trusted Third Party Reviewed International journal

Jae-Gwi Choi, Kouichi Sakurai, Ji-Hwan Park

Prof. ACNS 2003 2846 265 - 279 2003.10

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Timing Attack against Implementation of a Parallel Algorithm for Modular Exponentiation Reviewed International journal

Yasuyuki Sakai, Kouichi SAKURAI

Proc. ACNS 2003 2846 319 - 330 2003.10

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A Mechanism to Detect Tampering on Mobile Agents using The Verification Agent Reviewed International journal

Yuki Kotegawa, Kouichi SAKURAI

Proc. International Workshop on Cryptology and Network Security (CANS03) 2003.9

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Private Certified E-mail Systems with Electronic Notice Board Reviewed International journal

Kenji IMAMOTO, Kouichi SAKURAI

Proc. International Workshop on Cryptology and Network Security (CANS03) 2003.9

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A Tampering Detection Mechanism using a Trusted Host for Mobile Agents Reviewed International journal

Yuki KOTEGAWA, Kouichi SAKURAI

Proc. of the 2003 International Workshop on CRYPTOLOGY AND NETWORK SECURITY (CANS2003) 2003.9

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Certified E-mail Systems Using Public Notice Board Reviewed International journal

Kenji IMAMOTO, Kouichi SAKURAI

Trust and Privacy in Digital Business (TrustBus'03) 460 - 464 2003.9

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DOI： 10.1109/DEXA.2003.1232065
A Software Fingerprinting Scheme for Java Using Classfiles Obfuscation Reviewed International journal

Kazuhide Fukushima, Kouichi SAKURAI

Proc. WISA 2003 2908 303 - 316 2003.8

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配達仲介人を利用した配達証明付き電子メールの改良 Reviewed

今本健二, 櫻井幸一

情報処理学会論文誌 2003.8

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Enhancing Airport Access Control Security With Multiple Biometrics Contactless Smart Card Reviewed

M.David and K.SAKURAI

2003.8

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A secure digital watermark system for secondary distribution Reviewed

Keiichi Iwamura, Kouichi Sakurai, Hideki Imai

Electronics and Communications in Japan, Part III: Fundamental Electronic Science (English translation of Denshi Tsushin Gakkai Ronbunshi) 86 ( 6 ) 76 - 85 2003.6

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DOI： 10.1002/ecjc.1151
A secure digital watermark system for secondary distribution Reviewed

Keiichi Iwamura, Kouichi Sakurai, Hideki Imai

Electronics and Communications in Japan, Part III: Fundamental Electronic Science (English translation of Denshi Tsushin Gakkai Ronbunshi) 86 ( 6 ) 76 - 85 2003.6

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DOI： 10.1002/ecjc.1151
Decentralization Methods of Certification Authority Using the Digital Signature Schemes Reviewed International journal

Satoshi KOGA, Kouichi SAKURAI

2nd Annual PKI Research Workshop 2003.4

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A Reject Timing Attack on an IND-CCA2 Public-Key Cryptosystem Reviewed International journal

Kouichi SAKURAI and Tsuyoshi TAKAGI

5th International Conference on Information Security and Cryptology, ICISC 2002 2587 359 - 373 2003.1

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“A Secure Fragile Watermarking” Reviewed

32 ( 1 ) 22 - 28 2003.1

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Previous fragile watermarking algorithms have been kept in secret, and not been discussed about the security except²⁾.In 2), a secure fragile watermarking algorithm was proposed, even if it opens to the public. However, the algorithm needs to use different keys for different images. In this paper, we propose a fragile watermarking algorithm which can use the same key for different images. We show that this algorithm is secure, if it uses secure cryptographic function, pseudo-random number and self-synchronized pattern.

DOI： 10.11371/iieej.32.22
Use of montgomery trick in precomputation of multi-scalar multiplication in elliptic curve cryptosystems Reviewed

Katsuyuki Okeya, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E86-A ( 1 ) 98 - 112 2003.1

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An Efficient Representation of Scalars for Simultaneous Elliptic Scalar Multiplication Reviewed

Yasuyuki Sakai, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E86-A ( 5 ) 1135 - 1146 2003.1

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A Simple Power Attack On a Randomized Addition-Subtraction Chains Method for Elliptic Curve Cryptosystems Reviewed International journal

Katsuyuki Okeya, Kouichi Sakurai

IEICE Trans. Fundamentals E86A ( 5 ) 1171 - 1180 2003.1

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Use of Montgomery Trick in Precomputation of Multi-Scalar Multiplication in Elliptic Curve Cryptosystem Reviewed International journal

Katsuyuki Okeya, Kouichi Sakurai

IEICE Trans. Fundamentals E86A ( 1 ) 98 - 112 2003.1

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サイドチャネル攻撃へのウィンドウ法を用いた防御法に対する2階電力差分攻撃 Reviewed

桶屋勝幸, 櫻井幸一

情報処理学会論文誌 2003.1

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高度版ランダム化加算減算鎖法に対する多重電力解析 Reviewed

桶屋勝幸, 櫻井幸一

情報処理学会論文誌 2003.1

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A Simple Power Attack on a Randomized Addition-Subtraction Chains Method for Elliptic Curve Cryptosystems Reviewed

Katsuyuki Okeya, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E86-A ( 5 ) 1171 - 1180 2003

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Timing attack against implementation of a parallel algorithm for modular exponentiation Reviewed

Yasuyuki Sakai, Kouichi Sakurai

Lecture Notes in Computer Science 2846 319 - 330 2003

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On the security of yet another reduced version of 3-pass HAVAL Reviewed

Yong Sork Her, Kouichi Sakurai

Unknown Journal 137 2003

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Analysis and design of SHA-V and RIPEMD-V with variable output-length Reviewed

Yong Sork Her, Kouichi Sakurai

Research Reports on Information Science and Electrical Engineering of Kyushu University 8 ( 1 ) 13 - 18 2003

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Risks with Raw-key Masking the Security Evaluation of 2-key XCBC Reviewed International journal

Soichi Furuya, Kouichi Sakurai

Information and Communications Security, 4th International Conference, ICICS 2002 2513 327 - 341 2002.12

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A Certified E-mail System With Receiver's Selective Usage of Delivery Authority Reviewed International journal

Kenji IMAMOTO, Kouichi SAKURAI

Third International Cryptology Conference in India (INDOCRYPT2002) 2551 326 - 338 2002.12

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Single-path Authenticated-encryption Scheme Based on Universal Hashing Reviewed International journal

Soichi Furuya, Kouichi Sakurai

9th Annual Workshop, SAC 2002 2595 94 - 109 2002.8

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A Scalable On-line Certified E-mail Protocol Using Password Authentication Reviewed International journal

Kenji IMAMOTO, Kouichi SAKURAI

The 3rd International Workshop on Information Security Applications (WISA2002) 2002.8

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A Fast Scalar Multiplication Method with Randomized Projective Coordinates on a Montgomery-form Elliptic Curve Secure against Side Channel Attacks Reviewed International journal

Katsuyuki Okeya, Kunihiko Miyazaki, Kouichi Sakurai

The 4th International Conference on Information Security and Cryptology (ICISC 2001) 2002.1

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A Scalar Multiplication Algorithm with Recovery of the y-Coordinate on the Montgomery Form and Analysis of Efficiency for Elliptic Curve Cryptosystems Reviewed International journal

Katsuyuki Okeya, Kouichi Sakurai

IEICE Trans. Fundamentals E85A ( 1 ) 84 - 93 2002.1

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An Efficient Representation of Scalars for Simultaneous Elliptic Scalar Multiplication Reviewed International journal

Yasuyuki Sakai, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E86A ( 5 ) 1135 - 1146 2002.1

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Speeding Up Elliptic Scalar Multiplication Using Multidoubling Reviewed International journal

Yasuyuki Sakai, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E85A ( 5 ) 1075 - 1083 2002.1

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暗号に利用可能なモンゴメリ型楕円曲線の存在数に関する一考察 Reviewed

桶屋勝幸, 宮崎邦彦, 櫻井幸一

応用数理学会論文誌 2002.1

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サイドチャネル攻撃を防ぐモンゴメリ型楕円曲線上の高速なスカラー倍計算方法 - 理論的アプローチ - Reviewed

桶屋勝幸, 宮崎邦彦, 櫻井幸一

情報処理学会論文誌 2002.1

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New Semantically Secure Public-Key Cryptosystems from the RSA-Primitive Reviewed International journal

Kouichi SAKURAI and Tsuyoshi TAKAGI

5th International Workshop on Practice and Theory in Public Key Cryptography, PKC 2002 2002.1

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A Second-Order DPA Attack Breaks a Window-method based Countermeasure against Side Channel Attacks Reviewed International journal

Katsuyuki Okeya, Kouichi Sakurai

Information Security Conference (ISC 2002) 2002.1

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Fast Multi-Scalar Multiplication Methods on Elliptic Curves with Precomputation Strategy using Montgomery Trick Reviewed International journal

Katsuyuki Okeya, Kouichi Sakurai

Cryptographic Hardware and Embedded System (CHES 2002) 2523 564 - 578 2002.1

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On Insecurity of the Side Channel Attack Countermeasure using Addition-Subtraction Chains under Distinguishability between Addition and Doubling Reviewed International journal

Katsuyuki Okeya, Kouichi Sakurai

Information Security and Privacy, 7th Australasian Conference (ACISP 2002) 2002.1

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An IND-CCA2 Public-Key Cryptosystem with Fast Decryption Reviewed International journal

Johannes Buchmann, Kouichi SAKURAI and Tsuyoshi TAKAGI

4th International Conference on Information Security and Cryptology, ICISC'01 2002.1

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A scalar multiplication algorithm with recovery of the y-coordinate on the montgomery form and analysis of efficiency for elliptic curve cryptosystems Reviewed

Katsuyuki Okeya, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E85-A ( 1 ) 84 - 93 2002

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Speeding up elliptic scalar multiplication using multidoubling Reviewed

Yasuyuki Sakai, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E85-A ( 5 ) 1075 - 1083 2002

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On the Power of Direct Computations in Speeding Up Elliptic Scalar Multiplication Reviewed International journal

Y.Sakai and K.SAKURAI

PreProc. Eighth Annual Workshop on Selected Areas in Cryptography (Aug. 2001) 2001.8

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Efficient elliptic curve cryptosystems from a scalar multiplication algorithm with recovery of the y-coordinate on a Montgomery-form elliptic curve Reviewed International journal

K.Okeya and K.SAKURAI

Proc. Workshop on Cryptographic Hardware and Embedded Systems 2001 2001.5

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English vs. Sealed bid in anonymous electronic auction protocols Reviewed International journal

Hirakiuchi DAISUKE , Kouichi Sakurai

Proc. of 10th IEEE international workshops on enabling technologies, WETICE 2001 171 - 176 2001.1

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DOI： 10.1109/ENABL.2001.953409
On distributed cryptographic protocols for threshold RSA signing and decrypting with no dealer Reviewed

Shingo Miyazaki, Kouichi Sakurai, Moti Yung

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E84-A ( 5 ) 1177 - 1184 2001.1

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Efficient scalar multiplications on elliptic curves with direct computations of several doublings Reviewed

Yasuyuki Sakai, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E84-A ( 1 ) 120 - 129 2001.1

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A theory of demonstrating program result-correctness with cryptographic applications Reviewed

Kouichi Sakurai

IEICE Transactions on Information and Systems E84-D ( 1 ) 4 - 14 2001.1

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Efficient Scalar Multiplications on Elliptic Curves with Direct Computations of Several Doublings Reviewed International journal

Yasuyuki Sakai, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E84A ( 1 ) 120 - 129 2001.1

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A Theory of Demonstrating Program Result-Correctness with Cryptographic Applications Invited Reviewed International journal

Kouichi SAKURAI

IEICE Trans. E84D ( 1 ) 4 - 14 2001.1

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On Distributed Cryptographic Protocols for Threshold RSA Signing and Decrypting with No Dealer Reviewed International journal

Shingo MIYAZAKI, Kouichi SAKURAI and Moti YUNG

IEICE Trans E84A ( 5 ) 1177 - 1183 2001.1

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非周期的自己アフィンタイル貼りにおけるタイルの境界集合の構成と彩色 Reviewed

貞広泰造, 櫻井幸一

情報処理学会論文誌 2001.1

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複数の機密画像を埋め込み可能なグラフタイプ視覚複合型秘密分散方式の拡張 Reviewed

須賀祐治, 岩村恵市, 櫻井幸一, 今井秀樹

情報処理学会論文誌 2001.1

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2次配布に対して安全な電子透かしシステム Reviewed

岩村恵市, 櫻井幸一, 今井秀樹

電子情報通信学会論文誌 2001.1

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Efficient Elliptic Curve Cryptosystems from a Scalar Multiplication Algorithm with Recovery of the $y$-Coordinate on a Montgomery-Form Elliptic Curve Reviewed International journal

Katsuyuki Okeya, Kouichi Sakurai

Cryptographic Hardware and Embedded System (CHES 2001) 2001.1

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An Anonymous Electronic Bidding Protocol Based on New Convertible Group Signature Scheme Reviewed International journal

Kouichi SAKURAI, Shingo Miyazaki

Proc. ACISP2000 2000.7

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配布者の不正に対して安全な電子透かしシステム Reviewed

岩村恵市, 櫻井幸一, 今井秀樹

電子情報通信学会論文誌 2000.7

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Efficient Scalar Multiplication on Elliptic Curves without Repeated Doublings and their Practical Performance Reviewed International journal

Yasuyuki Sakai, Kouichi SAKURAI

Proc. ACISP2000 2000.7

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On zero-knowledge proofs: "from membership to decision" Reviewed International journal

G. Di Crecenzo, K. SAKURAI and M. Yung

Proc. ACM STOC2000 2000.5

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Elliptic Curves with the Montgomery-Form and Their Cryptographic Applications Reviewed International journal

Katsuyuki Okeya, Hiroyuki Kurumatani, Kouichi Sakurai

Public Key Cryptography (PKC 2000) 1751 238 - 257 2000.1

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A practical off-line digital money system with partially blind signatures based on the discrete logarithm problem Reviewed

Shingo Miyazaki, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E83-A ( 1 ) 106 - 108 2000.1

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A Progress Report on Lattice Based Public-Key Cryptosystems -Theoretical Security versus Practical Cryptanalysis Reviewed

Kouichi Sakurai

IEICE Transactions on Information and Systems E83-D ( 3 ) 570 - 579 2000.1

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On the Practical Performance of Hyperelliptic Curve Cryptosystems in Software Implementation Reviewed International journal

Yasuyuki Sakai, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E83A ( 4 ) 692 - 703 2000.1

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A Progress Report on Lattice Based Public-Key Cryptosystems --Theoretical Security versus Practical Cryptanalysis -- Invited Reviewed International journal

Kouichi SAKURAI

IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS E83D ( 3 ) 570 - 579 2000.1

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A practical off-line digital-money system with partilly blind signatures based on the discrete logarithm problem Reviewed International journal

Shingo MIYAZAKI, Kouichi SAKURAI

IEICE Transactions E83A ( 1 ) 106 - 108 2000.1

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変換可能なグループ署名を用いた電子電子入札方式 Reviewed

宮崎真悟, 櫻井幸一

情報処理学会論文誌 2000.1

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Language：Japanese Publishing type：Research paper (scientific journal)
Power Analysis Breaks Elliptic Curve Cryptosystems even Secure against the Timing Attack Reviewed International journal

Katsuyuki Okeya, Kouichi Sakurai

Progress in Cryptology - INDOCRYPT 2000 2000.1

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Language：English Publishing type：Research paper (international conference proceedings)
Making Hash Functions from Block Ciphers secure and efficient by using convolutional codes Reviewed International journal

Toru Inoue and Kouichi SAKURAI

Proc. PKC2000 1751 391 - 404 2000.1

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Language：English Publishing type：Research paper (international conference proceedings)
On the practical performance of hyperelliptic curve cryptosystems in software implementation Reviewed

Yasuyuki Sakai, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E83-A ( 4 ) 692 - 701 2000

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Language：English Publishing type：Research paper (scientific journal)
A Hardware-Oriented Algorithm for Computing in Jacobians and Its Implementation for Hyperelliptic Cryptosystems Reviewed International journal

Tetsuya Tamura, Kouichi SAKURAI

PreProc. 1999 International Conference on Information Security and Cryptology 1787 221 - 235 1999.12

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Language：English Publishing type：Research paper (international conference proceedings)
Over $F_p$ vs. $F_{2^n}$ over and on Pentium vs. on Alpha in Software Implementation of Hyperelliptic Curve Reviewed International journal

Yasuyuki Sakai and Kouichi SAKURAI

PreProc. 1999 International Conference on Information Security and Cryptology 1787 82 - 101 1999.12

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Language：English Publishing type：Research paper (international conference proceedings)
On Threshold RSA-Signing with no Dealer Reviewed International journal

Shingo MIYAZAKI, Kouichi SAKURAI and Moti YUNG

PreProc. 1999 International Conference on Information Security and Cryptology 1787 197 - 207 1999.12

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Language：English Publishing type：Research paper (international conference proceedings)
公開掲示板を用いた競り下げ電子オークション方式 Reviewed

宮崎真悟, 櫻井幸一

情報処理学会論文誌 1999.8

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有限体$F_{2^n}$上の超楕円曲線暗号のソフトウエア実装 Reviewed

酒井康行, 櫻井幸一

電子情報通信学会論文誌 1999.8

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Language：Japanese Publishing type：Research paper (scientific journal)
オフライン型電子現金システムの分類と管理機関の内部不正に対する安全性評価 Reviewed

宮崎真悟, 櫻井幸一

情報処理学会論文誌 1999.3

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Language：Japanese Publishing type：Research paper (scientific journal)
Toward Fair International Key Escrow -- An attempt by distributed Trusted Third Agencies with threshold cryptography -- Reviewed International journal

S.Miyazaki, I. Kuroda, and K. SAKURAI

Proc. 1999 International Workshop on Practice and Theory in Public Key Cryptography 1560 171 - 187 1999.1

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Language：English Publishing type：Research paper (international conference proceedings)
Divertible and subliminal-free zero-knowledge proofs for languages Reviewed International journal

T.Itoh, M.Burmester, Y.Desmdet, K.SAKURAI, and H.Shizuya

J. of Cryptology 12 ( 3 ) 197 - 223 1999.1

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1007/s001459900053
Efficient algorithms for the Jacobian variety fo hyperelliptic curves $y^2 = x^p -x + 1$ over a finite field of odd characteristic $p$ Reviewed International journal

I. Duursma, and K. SAKURAI

Coding Theory, Cryptography and related areas 1999.1

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Language：English Publishing type：Research paper (international conference proceedings)
A Parallel Withstanding Attack with Forging Key Certificates on an Electronic Cash System Based on Message-Recovery Blind Digital Signatures Reviewed International journal

S.Miyazaki, and K. SAKURAI

Proc. International Workshop on Cryptographic Techniques & E-Commerce 1999.1

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Language：English Publishing type：Research paper (international conference proceedings)
A Bulletin-Board Based Digital Auction Scheme with Bidding Down Strategy - Towards Anonymous Electronic Bidding without Anonymous Channels nor Trusted Centers Reviewed International journal

K. SAKURAI and S.Miyazaki

Proc. International Workshop on Cryptographic Techniques & E-Commerce 1999.1

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Language：English Publishing type：Research paper (international conference proceedings)
Classification of Chaum-Fiat-Naor Paradigm based anonymous electronic cash systems accroding to vulunerability aganist insider-attacks from untrusted authorities Reviewed International journal

M.Shingo and K. SAKURAI

Proc. International Workshop on Cryptographic Techniques & E-Commerce 1999.1

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Language：English Publishing type：Research paper (international conference proceedings)
An improvement of ElYaniv-Fiat-Karp-Tarpin's money-making bi-directional strategy Reviewed International journal

E. Dannoura and K.SAKURAI

Information Processing Letters 66 ( 1 ) 27 - 33 1998.4

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/S0020-0190(98)00032-5
An improvement on El-Yaniv-Fiat-Karp-Turpin's money-making bi-directional trading strategy Reviewed

Eisuke Dannoura, Kouichi Sakurai

Information Processing Letters 66 ( 1 ) 27 - 33 1998.4

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Language：English Publishing type：Research paper (scientific journal)
Secure hyperelliptic cryptosystems and their performance Reviewed International journal

Y.Sakai, K. SAKURAI and M. Ishizuka

Proc. PKC'98 1998.1

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A Structural comparison of the computational difficulty of breaking discrete log cryptosystems. Reviewed International journal

K.SAKURAI and H. Shizuya

J. of Cryptology 11 ( 1 ) 29 - 43 1998.1

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1007/s001459900033
取引手数料を考慮したオンライン為替交換アルゴリズムの効率解析 Reviewed

檀浦　詠介, 櫻井　幸一

情報処理学会論文誌 1998.1

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Language：Japanese Publishing type：Research paper (scientific journal)
Design of Hyperelliptic Cryptosystems in Small Characteristic and a Software Implementation over $F_{2^n}$ Reviewed International journal

Y.Sakai, K. SAKURAI

Proc. of ASIACRYPT'98 1514 80 - 94 1998.1

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Language：English Publishing type：Research paper (international conference proceedings)
Checking programs discreteetly: Demonstrating result-correctness efficiently while concealing it Reviewed International journal

G. Di Crecenzo, K. SAKURAI and M. Yung

Algorithms and Computation 9th International Symposium, ISAAC'98 1533 59 - 68 1998.1

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Language：English Publishing type：Research paper (international conference proceedings)
Secure hyperelliptic cryptosystems and their performance Reviewed International journal

Y.Sakai, K. SAKURAI and M. Ishizuka

Proc. Public Key Cryptography'98 1998.1

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A more efficient untraceable e-cash system with partially blind signatures based on the the discrete logarithm problem Reviewed International journal

S.Miyazaki, and K. SAKURAI

Proc.Financial Cryptology'98 1998.1

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Language：English Publishing type：Research paper (international conference proceedings)
Result-indistinguishable zero-knowledge proofs: increased power and constant-round protocols Reviewed International journal

G. Di Crecenzo, K. SAKURAI and M. Yung

STACS 98, 15th Annual Symposium on Theoretical Aspects of Computer Science 1373 511 - 521 1998.1

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Language：English Publishing type：Research paper (international conference proceedings)
Security Issues for Contactless Smart Cards Reviewed International journal

M.David and K. SAKURAI

Proc. PKC'98 1998.1

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Language：English Publishing type：Research paper (international conference proceedings)
Practical proofs of knowledge without relying on theoretical proofs of membership on languages Reviewed

Kouichi Sakurai

Theoretical Computer Science 181 ( 2 ) 317 - 335 1997.7

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/S0304-3975(96)00277-0
Practical proofs of knowledge without relying on theoretical proofs of membership on languages Reviewed

Kouichi Sakurai

Theoretical Computer Science 181 ( 2 ) 317 - 335 1997.7

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/S0304-3975(96)00277-0
On non-pseudorandomness from block ciphers with provable immunity against linear cryptanalysis Reviewed

Kouichi Sakurai, Yuliang Zheng

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E80-A ( 1 ) 19 - 24 1997.1

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Language：English Publishing type：Research paper (scientific journal)
A short certificate of the number of universal optimal strategies for stopping simple stochastic games Reviewed

Akio Yanbe, Kouichi Sakurai

Information Processing Letters 57 ( 1 ) 17 - 24 1996.1

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/0020-0190(95)00181-6
A short certificate of the number of universal optimal strategies for stopping simple stochastic games Reviewed

Akio Yanbe, Kouichi Sakurai

Information Processing Letters 57 ( 1 ) 17 - 24 1996.1

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/0020-0190(95)00181-6
On the complexity of the discrete logarithm for a general finite group Reviewed

Tatsuaki Okamoto, Kouichi Sakurai, Hiroki Shizuya

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E79-A ( 1 ) 61 - 65 1996

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Language：English Publishing type：Research paper (scientific journal)
Subliminal channels for transferring signatures Yet another cryptographic primitive Reviewed

Kouichi Sakurai, Toshiya Itoh

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E77-A ( 1 ) 31 - 38 1994.1

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Language：English Publishing type：Research paper (scientific journal)
Constant round perfect ZKIP of computational ability Reviewed

Toshiya Itoh, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E76-A ( 7 ) 1225 - 1233 1993.7

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Language：English Publishing type：Research paper (scientific journal)
Characterization of languages in constant round perfect zero-knowledge interactive proofs Reviewed

Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E76-A ( 4 ) 546 - 554 1993.4

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Language：English Publishing type：Research paper (scientific journal)
On the complexity of constant round ZKIP of possession of knowledge Reviewed

Tosyiya Itoh, Kouichi Sakurai

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E76-A ( 1 ) 31 - 39 1993.1

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Language：English Publishing type：Research paper (scientific journal)
Practical consequences of the discrepancy between zero-knowledge protocols and their parallel execution Reviewed

Kouichi Sakurai, Toshiya Itoh

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E76-A ( 1 ) 14 - 22 1993.1

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▼display all

Books

情報セキュリティ (IT Text)

宮地充子編著、菊池浩明編著執筆分担　/櫻井幸一（ Role： Joint author）

オーム社 2003.10

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Language：Japanese Book type：Scholarly book

ネットワーク化の進展により重要度が増している情報セキュリティ技術について、基礎となる現代暗号理論から評価、認証技術、ネットワークセキュリティの最新の具体的技術まで、基準や情報倫理も含めて網羅した教科書。　情報セキュリティの全分野を体系的に学習できる。
数論アルゴリズムと楕円暗号理論入門ニールコブリッツ (著), 桜井幸一 (翻訳)

ニールコブリッツ (著), 桜井幸一 (翻訳)（ Role： Sole translator）

(シュプリンガー数学クラブ) 1997.8

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Language：Japanese Book type：Scholarly book

Repository Public URL： http://hdl.handle.net/2324/1001353021

Presentations

Application and limitations of non-fungible tokens from a cryptographic perspective Invited

Kouichi SAKURAI

BIOTC 2023 2023.7

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Event date： 2023.7

Language：English Presentation type：Oral presentation (general)

Country：Japan

Other Link： https://www.biotc.net/biotc2023.html
Revisiting computationally independent pair of one-way functions from the point of view of non-malleability Invited International conference

The 2021 IEEE Conference on Dependable and Secure Computing 2021.2

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Event date： 2021.1 - 2021.2

Language：English Presentation type：Oral presentation (invited, special)

Country：Japan

Other Link： http://nsclab.org/dsc2021/keynote.html
Hiding digital information with AI: Power and Generalization of Adversarial Cryptography Invited

The International Conference on Security & Privacy (ICSP 2020) 2020.11

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Event date： 2020.11 - 2021.11

Language：English Presentation type：Oral presentation (invited, special)

Country：India

Other Link： https://sites.google.com/view/icsp2020/invited-speakers
How does Blockchain improve Electronic Voting ? Invited International conference

International Conference on Computational Intelligence, Data Science and Cloud Computing 2020.11

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Event date： 2020.9

Language：English Presentation type：Oral presentation (invited, special)

Country：India

Other Link： http://www.iem-icdc.org/index.html#
Power and limitation of Adversarial Machine Learning an thdeir consequences Invited International conference

Kouichi SAKURAI

The Conference for ICT-Research in the Netherlands 2018.3

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Event date： 2018.3

Language：English Presentation type：Oral presentation (invited, special)

Country：Netherlands

Other Link： http://www.ictopen.nl
Non-commutative approach enhance security of cryptosytems ?— from Ong-Schnorr-Shamir via Sato-Araki towards Post Quantum Paradigm -- Invited International conference

2018.1

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Event date： 2018.1 - 2018.6

Language：English Presentation type：Oral presentation (invited, special)

Venue：IIT (BHU) Varanasi Country：India
(1)Bitcoin, Blockchain, FinTech, IoT, AI and your Future (2) Cryptography with Blockchain Invited International conference

Koichi SAKURAI

2018.6

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Event date： 2017.11 - 2017.12

Language：Japanese Presentation type：Symposium, workshop panel (public)

Country：India

Other Link： https://www.isical.ac.in/~rcbose/blockchain2017/
Anti-forensic aspects of biometirics towards Receipt-freeness and Coercion-Resistance in authentication protocols Invited International conference

ATCS workshop of 12th EAI International Conference on Security and Privacy in Communication Networks 2016.10

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Event date： 2016.10

Language：Japanese

Country：China

Other Link： http://securecomm.org/2016/show/program-preliminary
Anti-forensic Aspects in Biometric Authentication Protocols: Receipt-freeness, Coercion-Resistance, and Undeniability Invited International conference

Kouichi Sakurai

UAE Cyber Security Workshop 2016.4

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Event date： 2016.4

Language：English Presentation type：Oral presentation (invited, special)

Country：United Arab Emirates

Other Link： https://cybersecurityseminar.splashthat.com/
New infrastructure and applications developed from a cryptocurrency BITCOIN and a platform ETHEREUM Invited International conference

Kouichi Sakurai

ICoICT 2015 (The 3rd International Conference of Information and Communication Technology) 2015.5

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Event date： 2015.5

Language：English Presentation type：Oral presentation (invited, special)

Country：Indonesia

Other Link： http://2015.icoict.org/keynote-speaker/
A recent progress on design and analysis of Neural Cryptosystems Invited International conference

Kouichi Sakurai

The 8th IEEE International Conference on Smart City and Informatization (iSCI 2020) 2020.12

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Event date： 2020.12 - 2021.1

Language：English Presentation type：Oral presentation (general)

Country：China
An ANN Based Sequential Detection Method for Balancing Performance Indicators of IDS

Hao Zhao, Yaokai Feng, Hiroshi Koide, Kouichi Sakurai

7th International Symposium on Computing and Networking, CANDAR 2019 2019.11

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Event date： 2019.11

Language：English

Country：Japan
Reliable decentralized oracle with mechanisms for verification and disputation

Limao Ma, Kosuke Kaneko, Subodh Sharma, Kouichi Sakurai

7th International Symposium on Computing and Networking Workshops, CANDARW 2019 2019.11

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Event date： 2019.11

Language：English

Country：Japan
Frame difference generative adversarial networks Clearer contour video generating

Rui Qiu, Danilo Vasconcellos Vargas, Kouich Sakurai

7th International Symposium on Computing and Networking Workshops, CANDARW 2019 2019.11

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Event date： 2019.11

Language：English

Country：Japan
Proposal and evaluation of a security incident response training method using programming

Katsumi Nagai, Hiroshi Koide, Kouichi Sakurai

20th Annual Conference on Information Technology Education, SIGITE 2019 2019.9

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Event date： 2019.10

Language：English

Country：United States
Efficient shortest path routing algorithms for distributed XML processing

Ye Longjian, Hiroshi Koide, Dirceu Cavendish, Kouichi Sakurai

15th International Conference on Web Information Systems and Technologies, WEBIST 2019 2019.1

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Event date： 2019.9

Language：English

Country：Austria
Secret Sharing on Evolving Multi-level Access Structure

Sabyasachi Dutta, Partha Sarathi Roy, Kazuhide Fukushima, Shinsaku Kiyomoto, Kouichi Sakurai

20th World Conference on Information Security Applications, WISA 2019 2020.1

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Event date： 2019.8

Language：English

Country：Korea, Republic of
A sequential scheme for detecting cyber attacks in IoT environment

Yan Naung Soe, Yaokai Feng, Paulus Insap Santosa, Rudy Hartanto, Kouichi Sakurai

17th IEEE International Conference on Dependable, Autonomic and Secure Computing, IEEE 17th International Conference on Pervasive Intelligence and Computing, IEEE 5th International Conference on Cloud and Big Data Computing, 4th Cyber Science and Technology Congress, DASC-PiCom-CBDCom-CyberSciTech 2019 2019.8

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Event date： 2019.8

Language：English

Country：Japan
Security and trust issues on digital supply chain

Haibo Zhang, Toru Nakamura, Kouichi Sakurai

17th IEEE International Conference on Dependable, Autonomic and Secure Computing, IEEE 17th International Conference on Pervasive Intelligence and Computing, IEEE 5th International Conference on Cloud and Big Data Computing, 4th Cyber Science and Technology Congress, DASC-PiCom-CBDCom-CyberSciTech 2019 2019.8

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Event date： 2019.8

Language：English

Country：Japan
Universal Rules for Fooling Deep Neural Networks based Text Classification

Di Li, Danilo Vasconcellos Vargas, Sakurai Kouichi

2019 IEEE Congress on Evolutionary Computation, CEC 2019 2019.6

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Event date： 2019.6

Language：English

Country：New Zealand
Deniable Secret Handshake Protocol - Revisited

Somnath Panja, Sabyasachi Dutta, Kouichi Sakurai

33rd International Conference on Advanced Information Networking and Applications, AINA-2019 2020.1

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Event date： 2019.3

Language：English

Country：Japan
Simulation of Secure Volunteer Computing by Using Blockchain

Johjima Shota, Kosuke Kaneko, Subodh Sharma, Kouichi Sakurai

33rd International Conference on Advanced Information Networking and Applications, AINA-2019 2020.1

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Event date： 2019.3

Language：English

Country：Japan
Implementing Lightweight IoT-IDS on Raspberry Pi Using Correlation-Based Feature Selection and Its Performance Evaluation

Yan Naung Soe, Yaokai Feng, Paulus Insap Santosa, Rudy Hartanto, Kouichi Sakurai

33rd International Conference on Advanced Information Networking and Applications, AINA-2019 2020.1

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Event date： 2019.3

Language：English

Country：Japan
Deniable Secret Handshake Protocol - Revisited

Somnath Panja, Sabyasachi Dutta, Kouichi Sakurai

33rd International Conference on Advanced Information Networking and Applications, AINA-2019 2020.1

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Event date： 2019.3

Language：English

Country：Japan
Simulation of Secure Volunteer Computing by Using Blockchain

Johjima Shota, Kosuke Kaneko, Subodh Sharma, Kouichi Sakurai

33rd International Conference on Advanced Information Networking and Applications, AINA-2019 2020.1

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Event date： 2019.3

Language：English

Country：Japan
Implementing Lightweight IoT-IDS on Raspberry Pi Using Correlation-Based Feature Selection and Its Performance Evaluation

Yan Naung Soe, Yaokai Feng, Paulus Insap Santosa, Rudy Hartanto, Kouichi Sakurai

33rd International Conference on Advanced Information Networking and Applications, AINA-2019 2020.1

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Event date： 2019.3

Language：English

Country：Japan
Deniable Secret Handshake Protocol - Revisited

Somnath Panja, Sabyasachi Dutta, Kouichi Sakurai

33rd International Conference on Advanced Information Networking and Applications, AINA-2019 2020.1

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Event date： 2019.3

Language：English

Country：Japan
Simulation of Secure Volunteer Computing by Using Blockchain

Johjima Shota, Kosuke Kaneko, Subodh Sharma, Kouichi Sakurai

33rd International Conference on Advanced Information Networking and Applications, AINA-2019 2020.1

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Event date： 2019.3

Language：English

Country：Japan
Implementing Lightweight IoT-IDS on Raspberry Pi Using Correlation-Based Feature Selection and Its Performance Evaluation

Yan Naung Soe, Yaokai Feng, Paulus Insap Santosa, Rudy Hartanto, Kouichi Sakurai

33rd International Conference on Advanced Information Networking and Applications, AINA-2019 2020.1

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Event date： 2019.3

Language：English

Country：Japan
Secret Sharing Schemes on Compartmental Access Structure in Presence of Cheaters

Jyotirmoy Pramanik, Partha Sarathi Roy, Sabyasachi Dutta, Avishek Adhikari, Kouichi Sakurai

14th International Conference on Information Systems Security, ICISS 2018 2018.1

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Event date： 2018.12

Language：English

Country：India
Analysis of variance of graph-clique mining for scalable proof of work

Hiroaki Anada, Tomohiro Matsushima, Chunhua Su, Weizhi Meng, Junpei Kawamoto, Samiran Bag, Kouichi Sakurai

14th International Conference on Information Security and Cryptology, Inscrypt 2018 2019.1

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Event date： 2018.12

Language：English

Country：China
Analysis of variance of graph-clique mining for scalable proof of work

Hiroaki Anada, Tomohiro Matsushima, Chunhua Su, Weizhi Meng, Junpei Kawamoto, Samiran Bag, Kouichi Sakurai

14th International Conference on Information Security and Cryptology, Inscrypt 2018 2019.1

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Event date： 2018.12

Language：English

Country：China
Analysis of variance of graph-clique mining for scalable proof of work

Hiroaki Anada, Tomohiro Matsushima, Chunhua Su, Weizhi Meng, Junpei Kawamoto, Samiran Bag, Kouichi Sakurai

14th International Conference on Information Security and Cryptology, Inscrypt 2018 2019.1

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Event date： 2018.12

Language：English

Country：China
A new design for evaluating moving target defense system

Wai Kyi Kyi Oo, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Tracing MIRAI malware in networked system

Yao Xu, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Suppressing chain size of blockchain-based information sharing for swarm robotic systems

Yuki Nishida, Kosuke Kaneko, Subodh Sharma, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Neural cryptography based on the topology evolving neural networks

Yuetong Zhu, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Empirical evaluation on robustness of deep convolutional neural networks activation functions against adversarial perturbation

Jiawei Su, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Detecting distributed cyber attacks in SDN based on automatic thresholding

Ryousuke Komiya, Yaokai Feng, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
A new design for evaluating moving target defense system

Wai Kyi Kyi Oo, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Tracing MIRAI malware in networked system

Yao Xu, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Suppressing chain size of blockchain-based information sharing for swarm robotic systems

Yuki Nishida, Kosuke Kaneko, Subodh Sharma, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Neural cryptography based on the topology evolving neural networks

Yuetong Zhu, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Empirical evaluation on robustness of deep convolutional neural networks activation functions against adversarial perturbation

Jiawei Su, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Detecting distributed cyber attacks in SDN based on automatic thresholding

Ryousuke Komiya, Yaokai Feng, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
A new design for evaluating moving target defense system

Wai Kyi Kyi Oo, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Tracing MIRAI malware in networked system

Yao Xu, Hiroshi Koide, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Suppressing chain size of blockchain-based information sharing for swarm robotic systems

Yuki Nishida, Kosuke Kaneko, Subodh Sharma, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Neural cryptography based on the topology evolving neural networks

Yuetong Zhu, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Empirical evaluation on robustness of deep convolutional neural networks activation functions against adversarial perturbation

Jiawei Su, Danilo Vasconcellos Vargas, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Detecting distributed cyber attacks in SDN based on automatic thresholding

Ryousuke Komiya, Yaokai Feng, Kouichi Sakurai

6th International Symposium on Computing and Networking Workshops, CANDARW 2018 2018.12

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Event date： 2018.11

Language：English

Country：Japan
Proof of disease A blockchain consensus protocol for accurate medical decisions and reducing the disease burden

Asoke K. Talukder, Manish Chaitanya, David Arnold, Kouichi Sakurai

4th IEEE SmartWorld, 15th IEEE International Conference on Ubiquitous Intelligence and Comput