Kouichi Sakurai

Jingyu Hua, Kouichi Sakurai: Botnet command and control based on Short Message Service and human mobility. Computer Networks 57(2): 579-597 (2013)

Yasufumi Hashimoto, Tsuyoshi Takagi, Kouichi Sakurai: General Fault Attacks on Multivariate Public Key Cryptosystems. IEICE Transactions 96-A(1): 196-205 (2013)

Nobuyuki Teraura, Kouichi Sakurai: Confidentiality of 2D Code using Infrared with Cell-level Error Correction. IJIMAI 2(1): 23-31 (2013)

Yizhi Ren, Mingchu Li, Yang Xiang, Yongrui Cui, Kouichi Sakurai: Evolution of cooperation in reputation system by group-based scheme. The Journal of Supercomputing 63(1): 171-190 (2013)

Amril Syalim, Takashi Nishide, Kouichi Sakurai: Supporting Secure Provenance Update by Keeping "Provenance" of the Provenance. ICT-EurAsia 2013: 363-372

Shinichi Matsumoto, Kouichi Sakurai: A proposal for the privacy leakage verification tool for Android application developers. ICUIMC 2013: 54

Dong Hao, Xiaojuan Liao, Avishek Adhikari, Kouichi Sakurai, Makoto Yokoo: A repeated game approach for analyzing the collusion on selective forwarding in multihop wireless networks. Computer Communications 35(17): 2125-2137 (2012)

Ilsun You, Jong-Hyouk Lee, Kouichi Sakurai: DSSH: Digital signature based secure handover for network-based mobility management. Comput. Syst. Sci. Eng. 27(3) (2012)

Amril Syalim, Takashi Nishide, Kouichi Sakurai: Securing Provenance of Distributed Processes in an Untrusted Environment. IEICE Transactions 95-D(7): 1894-1907 (2012)

Laiping Zhao, Yizhi Ren, MingChu Li, Kouichi Sakurai: Flexible service selection with user-specific QoS support in service-oriented architecture. J. Network and Computer Applications 35(3): 962-973 (2012)

Ruan Na, Yizhi Ren, Yoshiaki Hori, Kouichi Sakurai: Analytic Hierarchy Process aided Key Management Schemes Evaluation in Wireless Sensor Network. JNW 7(1): 88-100 (2012)

Dong Hao, Kouichi Sakurai: A Differential Game Approach to Mitigating Primary User Emulation Attacks in Cognitive Radio Networks. AINA 2012: 495-502

Shogo Nakamura, Yoshiaki Hori, Kouichi Sakurai: Communication-Efficient Anonymous Routing Protocol for Wireless Sensor Networks Using Single Path Tree Topology. AINA Workshops 2012: 766-771

Laiping Zhao, Kouichi Sakurai: On Revenue Driven Server Management in Cloud. CLOSER 2012: 295-305

Liang Zhao, Takashi Nishide, Kouichi Sakurai: Differential Fault Analysis of Full LBlock. COSADE 2012: 135-150

Satoru Akimoto, Yoshiaki Hori, Kouichi Sakurai: Collaborative Behavior Visualization and Its Detection by Observing Darknet Traffic. CSS 2012: 212-226

Takanori Yasuda, Kouichi Sakurai, Tsuyoshi Takagi: Reducing the Key Size of Rainbow Using Non-commutative Rings. CT-RSA 2012: 68-83

Fangming Zhao, Takashi Nishide, Yoshiaki Hori, Kouichi Sakurai: Analysis of Methods for Detecting Compromised Nodes and its Countermeasures. ICITCS 2012: 53-60

Yichao Xu, Kouichi Sakurai: Cooperatively securing network coding against pollution attacks with incentive mechanism. ICUIMC 2012: 52

Taketoshi Sakuraba, Kouichi Sakurai: Proposal of the Hierarchical File Server Groups for Implementing Mandatory Access Control. IMIS 2012: 639-644

Nobuyuki Teraura, Kouichi Sakurai: Preventing the Access of Fraudulent WEB Sites by Using a Special Two-Dimensional Code. IMIS 2012: 645-650

Satoshi Tanaka, Takashi Nishide, Kouichi Sakurai: Efficient Implementation of Evaluating Multivariate Quadratic System with GPUs. IMIS 2012: 660-664

Motoki Kitahara, Takashi Nishide, Kouichi Sakurai: A Method for Embedding Secret Key Information in RSA Public Key and Its Application. IMIS 2012: 665-670

Nobuyuki Teraura, Kouichi Sakurai: Information Hiding of Two-dimensional Code by Multi-layer Optical. ISPA 2012: 770-777

Takanori Yasuda, Tsuyoshi Takagi, Kouichi Sakurai: Application of Scalar Multiplication of Edwards Curves to Pairing-Based Cryptography. IWSEC 2012: 19-36

Rimba Whidiana Ciptasari, Kyung Hyune Rhee, Kouichi Sakurai: An Image Splicing Detection Based on Interpolation Analysis. PCM 2012: 390-401

Takanori Suga, Takashi Nishide, Kouichi Sakurai: Secure Keyword Search Using Bloom Filter with Specified Character Positions. ProvSec 2012: 235-252

Jingyu Hua, Kouichi Sakurai: Barrier: a lightweight hypervisor for protecting kernel integrity via memory isolation. SAC 2012: 1470-1477

Yaokai Feng, Yoshiaki Hori, Kouichi Sakurai, Jun-ichi Takeuchi: A Behavior-Based Detection Method for Outbreaks of Low-Rate Attacks. SAINT 2012: 267-272

Chunhua Su, Guilin Wang, Kouichi Sakurai: Analysis and Improvement of Privacy-Preserving Frequent Item Protocol for Accountable Computation Framework. TrustCom 2012: 1012-1017

Satoshi Tanaka, Tung Chou, Bo-Yin Yang, Chen-Mou Cheng, Kouichi Sakurai: Efficient Parallel Evaluation of Multivariate Quadratic Polynomials on GPUs. WISA 2012: 28-42

Jingyu Hua, MingChu Li, Yizhi Ren, Kouichi Sakurai: Efficient Context-Sensitive Intrusion Detection Based on State Transition Table. IEICE Transactions 94-A(1): 255-264 (2011)

Ilsun You, Yoshiaki Hori, Kouichi Sakurai: Towards formal analysis of wireless LAN security with MIS protocol. IJAHUC 7(2): 112-120 (2011)

Ilsun You, Jong-Hyouk Lee, Yoshiaki Hori, Kouichi Sakurai: Enhancing MISP with Fast Mobile IPv6 Security. Mobile Information Systems 7(3): 271-283 (2011)

Guojun Wang, Laurence Tianruo Yang, Kouichi Sakurai: Guest editorial: Trusted computing and communications. Security and Communication Networks 4(1): 1-2 (2011)

Yizhi Ren, MingChu Li, Kouichi Sakurai: FineTrust: a fine-grained trust model for peer-to-peer networks. Security and Communication Networks 4(1): 61-69 (2011)

Chul Sur, Youngho Park, Takashi Nishide, Kouichi Sakurai, Kyung Hyune Rhee: Securing Location-Aware Services Based on Online/Offline Signatures in VANETs. ARES 2011: 271-285

Laiping Zhao, Yizhi Ren, Kouichi Sakurai: A Resource Minimizing Scheduling Algorithm with Ensuring the Deadline and Reliability in Heterogeneous Systems. AINA 2011: 275-282

Liang Zhao, Takashi Nishide, Avishek Adhikari, Kyung Hyune Rhee, Kouichi Sakurai: Cryptanalysis of Randomized Arithmetic Codes Based on Markov Model. Inscrypt 2011: 341-362

Fangming Zhao, Takashi Nishide, Kouichi Sakurai: Multi-User Keyword Search Scheme for Secure Data Sharing with Fine-Grained Access Control. ICISC 2011: 406-418

Ruan Na, Yizhi Ren, Yoshiaki Hori, Kouichi Sakurai: A generic evaluation method for key management schemes in wireless sensor network. ICUIMC 2011: 55

Peng Gao, Takashi Nishide, Yoshiaki Hori, Kouichi Sakurai: Integrity for the In-flight web page based on a fragile watermarking chain scheme. ICUIMC 2011: 86

Rong Huang, Kouichi Sakurai: A Robust and Compression-Combined Digital Image Encryption Method Based on Compressive Sensing. IIH-MSP 2011: 105-108

Rimba Whidiana Ciptasari, Aulia Fajar, Fazmah Arif Yulianto, Kouichi Sakurai: An Efficient Key Generation Method in Audio Zero-Watermarking. IIH-MSP 2011: 336-339

Jun Furukawa, Akihiro Sakai, Takashi Nishide, Yoshiaki Hori, Kouichi Sakurai: Design and Implementation of a Forced Encryption Kernel Module. IMIS 2011: 607-611

Seiichiro Mizoguchi, Keisuke Takemori, Yutaka Miyake, Yoshiaki Hori, Kouichi Sakurai: Traceback Framework against Botmaster by Sharing Network Communication Pattern Information. IMIS 2011: 639-644

Yoshiaki Hori, Takashi Nishide, Kouichi Sakurai: Towards Countermeasure of Insider Threat in Network Security. INCoS 2011: 634-636

Takashi Nishide, Kouichi Sakurai: Security of Offline Anonymous Electronic Cash Systems against Insider Attacks by Untrusted Authorities Revisited. INCoS 2011: 656-661

Dong Hao, Avishek Adhikari, Kouichi Sakurai: Mixed-Strategy Game Based Trust Management for Clustered Wireless Sensor Networks. INTRUST 2011: 239-257

Fangming Zhao, Takashi Nishide, Kouichi Sakurai: Realizing Fine-Grained and Flexible Access Control to Outsourced Data with Attribute-Based Cryptosystems. ISPEC 2011: 83-97

Ryuzou Nishi, Kirill Morozov, Yoshiaki Hori, Kouichi Sakurai: Improvement on Secrecy Capacity of Wireless LAN Using Matched Filter. MSN 2011: 463-469

Yasufumi Hashimoto, Tsuyoshi Takagi, Kouichi Sakurai: General Fault Attacks on Multivariate Public Key Cryptosystems. PQCrypto 2011: 1-18

Takanori Yasuda, Kouichi Sakurai: A Security Analysis of Uniformly-Layered Rainbow - Revisiting Sato-Araki's Non-commutative Approach to Ong-Schnorr-Shamir Signature towards PostQuantum Paradigm. PQCrypto 2011: 275-294

Fumiharu Etoh, Yoshiaki Hori, Kouichi Sakurai: A Study of Communication Route Selection Considering Route Security. SAINT 2011: 360-365

Kazuhide Fukushima, Shinsaku Kiyomoto, Yutaka Miyake, Kouichi Sakurai: Towards Optimal Revocation and Tracing Schemes - The Power of the Ternary Tree. SECRYPT 2011: 37-49

Jingyu Hua, Kouichi Sakurai: A SMS-Based Mobile Botnet Using Flooding Algorithm. WISTP 2011: 264-279

Guojun Wang, Laurence Tianruo Yang, Kouichi Sakurai: Foreword. IEICE Transactions 93-D(3): 409-410 (2010)

Fangming Zhao, Yoshiaki Hori, Kouichi Sakurai: Analysis of Existing Privacy-Preserving Protocols in Domain Name System. IEICE Transactions 93-D(5): 1031-1043 (2010)

Ilsun You, Jong-Hyouk Lee, Kouichi Sakurai, Yoshiaki Hori: ESS-FH: Enhanced Security Scheme for Fast Handover in Hierarchical Mobile IPv6. IEICE Transactions 93-D(5): 1096-1105 (2010)

Kazuhide Fukushima, Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai: Improved Subset Difference Method with Ternary Tree. IEICE Transactions 93-A(11): 2034-2044 (2010)

Heru Sukoco, Yoshiaki Hori, Hendrawan, Kouichi Sakurai: Towards a Fairness Multimedia Transmission Using Layered-Based Multicast Protocol. IEICE Transactions 93-D(11): 2953-2961 (2010)

Huafei Zhu, Tadashi Araragi, Takashi Nishide, Kouichi Sakurai: Adaptive and Composable Non-committing Encryptions. ACISP 2010: 135-144

Seiichiro Mizoguchi, Yoshiro Fukushima, Yoshiaki Kasahara, Yoshiaki Hori, Kouichi Sakurai: Darknet Monitoring on Real-Operated Networks. BWCCA 2010: 278-285

Amril Syalim, Takashi Nishide, Kouichi Sakurai: Preserving Integrity and Confidentiality of a Directed Acyclic Graph Model of Provenance. DBSec 2010: 311-318

Jingyu Hua, Kouichi Sakurai: Modeling and Containment of Search Worms Targeting Web Applications. DIMVA 2010: 183-199

Laiping Zhao, Yizhi Ren, Yang Xiang, Kouichi Sakurai: Fault tolerant scheduling with dynamic number of replicas in heterogeneous system. HPCC 2010: 434-441

Liangjian Mao, Shuzhen Yao, Kai Zhang, Kouichi Sakurai: Design and Implementation of Document Access Control Model Based on Role and Security Policy. INTRUST 2010: 26-36

Dong Hao, Yizhi Ren, Kouichi Sakurai: A Game Theory-Based Surveillance Mechanism against Suspicious Insiders in MANETs - (Work-in-Progress). INTRUST 2010: 237-252

Laiping Zhao, Yizhi Ren, MingChu Li, Kouichi Sakurai: SPSE: A flexible QoS-based service scheduling algorithm for service-oriented Grid. IPDPS Workshops 2010: 1-8

Liang Zhao, Avishek Adhikari, Kouichi Sakurai: A New Scrambling Evaluation Scheme Based on Spatial Distribution Entropy and Centroid Difference of Bit-Plane. IWDW 2010: 29-44

Liang Zhao, Avishek Adhikari, Di Xiao, Kouichi Sakurai: Cryptanalysis on an Image Scrambling Encryption Scheme Based on Pixel Bit. IWDW 2010: 45-59

Tadashi Kiuchi, Yoshiaki Hori, Kouichi Sakurai: A Design of History Based Traffic Filtering with Probabilistic Packet Marking against DoS Attacks. SAINT 2010: 261-264

Jingyu Hua, Takashi Nishide, Kouichi Sakurai: Model-Based Intrusion Detection by Abstract Interpretation. SAINT 2010: 359-362

Fumiharu Etoh, Kenichi Takahashi, Yoshiaki Hori, Kouichi Sakurai: Study of Log File Dispersion Management Method. SAINT 2010: 371-374

Akihiro Sakai, Yoshiaki Hori, Kouichi Sakurai: Behavior Control Based on Dynamic Code Translation. SAINT 2010: 375-378

Huafei Zhu, Tadashi Araragi, Takashi Nishide, Kouichi Sakurai: Adaptive and Composable Non-interactive String-commitment Protocols. SECRYPT 2010: 354-361

Huafei Zhu, Tadashi Araragi, Takashi Nishide, Kouichi Sakurai: Universally Composable Non-committing Encryptions in the Presence of Adaptive Adversaries. SECRYPT 2010: 389-398

Takashi Nishide, Kouichi Sakurai: Distributed Paillier Cryptosystem without Trusted Dealer. WISA 2010: 44-60

Tai-Hoon Kim, Thanos Vasilakos, Kouichi Sakurai, Yang Xiao, Gansen Zhao, Dominik Slezak (Eds.): Communication and Networking - International Conference, FGCN 2010, Held as Part of the Future Generation Information Technology Conference, FGIT 2010, Jeju Island, Korea, December 13-15, 2010. Proceedings, Part II. Communications in Computer and Information Science 120, Springer 2010, isbn 978-3-642-17603-6

Chunhua Su, Feng Bao, Jianying Zhou, Tsuyoshi Takagi, Kouichi Sakurai: Security and Correctness Analysis on Privacy-Preserving k-Means Clustering Schemes. IEICE Transactions 92-A(4): 1246-1250 (2009)

Kouichi Sakurai: Foreword. IEICE Transactions 92-D(5): 765 (2009)

Yongrui Cui, MingChu Li, Yizhi Ren, Kouichi Sakurai: An Adaptive Reputation-Based Algorithm for Grid Virtual Organization Formation. IEICE Transactions 92-A(5): 1339-1346 (2009)

Cheng Guo, MingChu Li, Kouichi Sakurai: A New Secret Sharing Scheme Based on the Multi-Dealer. IEICE Transactions 92-A(5): 1373-1378 (2009)

Yizhi Ren, MingChu Li, Kouichi Sakurai: Modeling Security Bridge Certificate Authority Architecture. IEICE Transactions 92-A(6): 1544-1547 (2009)

Ilsun You, Kouichi Sakurai, Yoshiaki Hori: A Security Analysis on Kempf-Koodli's Security Scheme for Fast Mobile IPv6. IEICE Transactions 92-B(6): 2287-2290 (2009)

Chunhua Su, Feng Bao, Jianying Zhou, Tsuyoshi Takagi, Kouichi Sakurai: Distributed Noise Generation for Density Estimation Based Clustering without Trusted Third Party. IEICE Transactions 92-A(8): 1868-1871 (2009)

Ilsun You, Kouichi Sakurai, Yoshiaki Hori: An Enhanced Security Protocol for Fast Mobile IPv6. IEICE Transactions 92-D(10): 1979-1982 (2009)

Amril Syalim, Yoshiaki Hori, Kouichi Sakurai: Comparison of Risk Analysis Methods: Mehari, Magerit, NIST800-30 and Microsoft's Security Management Guide. ARES 2009: 726-731

Kohei Tatara, Kouichi Sakurai: A Signature Scheme Associated with Universal Re-signcryption. ARES 2009: 780-785

Tatsuro Fujii, Yizhi Ren, Yoshiaki Hori, Kouichi Sakurai: Security Analysis for P2P Routing Protocols. ARES 2009: 899-904

Ryuzou Nishi, Yoshiaki Hori, Kouichi Sakurai: Secrecy Capacity of Wireless LAN. ARES 2009: 905-910

Kohei Tatara, Yoshiaki Hori, Kouichi Sakurai: Polymorphic Worm Detection by Analyzing Maximum Length of Instruction Sequence in Network Packets. ARES 2009: 972-977

Chunhua Su, Justin Zhan, Kouichi Sakurai: Importance of Data Standardization in Privacy-Preserving K-Means Clustering. DASFAA Workshops 2009: 276-286

Jingyu Hua, MingChu Li, Kouichi Sakurai, Yizhi Ren: Efficient Intrusion Detection Based on Static Analysis and Stack Walks. IWSEC 2009: 158-173

Amril Syalim, Yoshiaki Hori, Kouichi Sakurai: Grouping Provenance Information to Improve Efficiency of Access Control. ISA 2009: 51-59

Akihiro Sakai, Yoshiaki Hori, Kouichi Sakurai: Formal Verification for Access Control in Web Information Sharing System. ISA 2009: 80-89

Dominik Slezak, Tai-Hoon Kim, Alan Chin-Chen Chang, Thanos Vasilakos, MingChu Li, Kouichi Sakurai (Eds.): Communication and Networking - International Conference, FGCN/ACN 2009, Held as Part of the Future Generation Information Technology Conference, FGIT 2009, Jeju Island, Korea, December 10-12, 2009. Proceedings. Communications in Computer and Information Science 56, Springer 2009, isbn 978-3-642-10843-3

Kazuhide Fukushima, Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai: Analysis of Program Obfuscation Schemes with Variable Encoding Technique. IEICE Transactions 91-A(1): 316-329 (2008)

Erwan Le Malécot, Masayoshi Kohara, Yoshiaki Hori, Kouichi Sakurai: Toward a Scalable Visualization System for Network Traffic Monitoring. IEICE Transactions 91-D(5): 1300-1310 (2008)

Ryuzou Nishi, Yoshiaki Hori, Kouichi Sakurai: Reliable Key Distribution Scheme for Lossy Channels. IEICE Transactions 91-D(5): 1485-1488 (2008)

Kenji Imamoto, Jianying Zhou, Kouichi Sakurai: Achieving evenhandedness in certified email system for contract signing. Int. J. Inf. Sec. 7(6): 383-394 (2008)

Yufeng Wang, Yoshiaki Hori, Kouichi Sakurai: Characterizing Economic and Social Properties of Trust and Reputation Systems in P2P Environment. J. Comput. Sci. Technol. 23(1): 129-140 (2008)

Kazuhide Fukushima, Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai: Optimization of Group Key Management Structure with a Client Join-Leave Mechanism. JIP 16: 130-141 (2008)

Chunhua Su, Feng Bao, Jianying Zhou, Tsuyoshi Takagi, Kouichi Sakurai: A New Scheme for Distributed Density Estimation based Privacy-Preserving Clustering. ARES 2008: 112-119

Chunhua Su, Kouichi Sakurai: A Distributed Privacy-Preserving Association Rules Mining Scheme Using Frequent-Pattern Tree. ADMA 2008: 170-181

Yufeng Wang, Yoshiaki Hori, Kouichi Sakurai: Thoughts on Multi-Disciplinary Inspired Research on Open Network and Information System. AINA Workshops 2008: 241-246

MingChu Li, Yizhi Ren, Kouichi Sakurai, Yongrui Cui, Zhi-Hui Wang: Granularity Considering in a Trust Model for P2P Networks. AINA Workshops 2008: 307-312

Ryuzou Nishi, Yoshiaki Hori, Kouichi Sakurai: Key Distribution Scheme Using Matched Filter Resistant against DoS Attack. AINA Workshops 2008: 1534-1539

Kenichi Takahashi, Akihiro Sakai, Kouichi Sakurai: Invalidation of Mailing List Address to Block Spam Mails. APSCC 2008: 841-846

Yizhi Ren, MingChu Li, Cheng Guo, Yongrui Cui, Kouichi Sakurai: Trust Similarity Measure in Trust Model for P2P Networks. EUC (2) 2008: 107-112

Kohei Tatara, Yoshiaki Hori, Kouichi Sakurai: Analyzing Maximum Length of Instruction Sequence in Network Packets for Polymorphic Worm Detection. MUE 2008: 485-489

Seiichiro Mizoguchi, Yoshiaki Hori, Kouichi Sakurai: Monitoring Unused IP Addresses on Segments Managed by DHCP. NCM (1) 2008: 510-515

Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai: FPGA-Targeted Hardware Implementations of K2. SECRYPT 2008: 270-277

Kazuhide Fukushima, Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai: Ternary Subset Difference Method and Its Quantitative Analysis. WISA 2008: 225-239

Yasufumi Hashimoto, Kouichi Sakurai: On construction of signature schemes based on birational permutations over noncommutative rings. IACR Cryptology ePrint Archive 2008: 340 (2008)

Jeong Ok Kwon, Ik Rae Jeong, Kouichi Sakurai, Dong Hoon Lee: Efficient verifier-based password-authenticated key exchange in the three-party setting. Computer Standards & Interfaces 29(5): 513-520 (2007)

Shinsaku Kiyomoto, Kazuhide Fukushima, Toshiaki Tanaka, Kouichi Sakurai: On Effectiveness of Clock Control in Stream Ciphers. IEICE Transactions 90-A(9): 1780-1787 (2007)

Kouichi Sakurai, Kazuhide Fukushima: Actual Condition and Issues for Mobile Security System. JIPS 3(2): 54-63 (2007)

Hyung Chan Kim, R. S. Ramakrishna, Wook Shin, Kouichi Sakurai: A Policy Language for the Extended Reference Monitor in Trusted Operating Systems. ARES 2007: 1160-1166

Chunhua Su, Feng Bao, Jianying Zhou, Tsuyoshi Takagi, Kouichi Sakurai: Privacy-Preserving Two-Party K-Means Clustering via Secure Approximation. AINA Workshops (1) 2007: 385-391

Yufeng Wang, Yoshiaki Hori, Kouichi Sakurai: On Studying Front-Peer Attack-Resistant Trust and Reputation Mechanisms Based on Enhanced Spreading Activation Model in P2P Environments. APWeb/WAIM Workshops 2007: 211-216

Yufeng Wang, Yoshiaki Hori, Kouichi Sakurai: An Adaptive Spreading Activation Approach to Combating the Front-Peer Attack in Trust and Reputation System. ATC 2007: 249-258

Sang-Soo Yeo, Kouichi Sakurai, Jin Kwak: A Practical Proxy Device for Protecting RFID Tag's Identifier. BLISS 2007: 55-58

Fangming Zhao, Yoshiaki Hori, Kouichi Sakurai: Two-Servers PIR Based DNS Query Scheme with Privacy-Preserving. IPC 2007: 299-302

Yuji Kugisaki, Yoshiaki Kasahara, Yoshiaki Hori, Kouichi Sakurai: Bot Detection Based on Traffic Analysis. IPC 2007: 303-306

Sang-Soo Yeo, Kouichi Sakurai, Sung-Eon Cho, KiSung Yang, Sung Kwon Kim: Forward Secure Privacy Protection Scheme for RFID System Using Advanced Encryption Standard. ISPA Workshops 2007: 245-254

Chunhua Su, Jianying Zhou, Feng Bao, Tsuyoshi Takagi, Kouichi Sakurai: Two-Party Privacy-Preserving Agglomerative Document Clustering. ISPEC 2007: 193-208

Satoshi Hada, Kouichi Sakurai: A Note on the (Im)possibility of Using Obfuscators to Transform Private-Key Encryption into Public-Key Encryption. IWSEC 2007: 1-12

Hyung Chan Kim, R. S. Ramakrishna, Wook Shin, Kouichi Sakurai: Enforcement of Integrated Security Policy in Trusted Operating Systems. IWSEC 2007: 214-229

Tai-Hoon Kim, Kouichi Sakurai, Sun-myung Hwang: Induction and Implementation of Security Requirements in Each System Block. MMM (2) 2007: 694-701

Kenichi Takahashi, Zhaoyu Liu, Kouichi Sakurai: An Approach of Program Analysis Prevention for Information Protection. MUE 2007: 35-40

Fangming Zhao, Yoshiaki Hori, Kouichi Sakurai: Analysis of Privacy Disclosure in DNS Query. MUE 2007: 952-957

Yufeng Wang, Yoshiaki Hori, Kouichi Sakurai: Study on Trust Inference and Emergence of Economical Small-World Phenomena in P2P Environment. PAKDD Workshops 2007: 502-514

Kenichi Takahashi, Yoshiki Mitsuyuki, Tsunenori Mine, Kouichi Sakurai, Makoto Amamiya: Design and Implementation of Security Mechanisms for a Hierarchical Community-Based Multi-Agent System. PRIMA 2007: 134-145

Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai: K2: A Stream Cipher Algorithm using Dynamic Feedback Control. SECRYPT 2007: 204-213

Yufeng Wang, Yoshiaki Hori, Kouichi Sakurai: On Characterizing Economic-Based Incentive-Compatible Mechanisms to Solving Hidden Information and Hidden Action in Ad Hoc Network. UIC 2007: 382-391

Kenichi Takahashi, Zhaoyu Liu, Kouichi Sakurai, Makoto Amamiya: An Approach of Trusted Program Generation for User-Responsible Privacy. UIC 2007: 1159-1170

Yasuyuki Sakai, Kouichi Sakurai: Simple Power Analysis on Fast Modular Reduction with Generalized Mersenne Prime for Elliptic Curve Cryptosystems. IEICE Transactions 89-A(1): 231-237 (2006)

Fumiaki Nagano, Kohei Tatara, Kouichi Sakurai, Toshihiro Tabata: An Intrusion Detection System using Alteration of Data. AINA (1) 2006: 243-248

Zhan Wang, Yoshiaki Hori, Kouichi Sakurai: Application and Evaluation of Bayesian Filter for Chinese Spam. Inscrypt 2006: 253-263

Jeong Ok Kwon, Kouichi Sakurai, Dong Hoon Lee: One-Round Protocol for Two-Party Verifier-Based Password-Authenticated Key Exchange. Communications and Multimedia Security 2006: 87-96

Kenichi Takahashi, Kouichi Sakurai: A Framework for the User-Oriented Personal Information Protection. Security and Management 2006: 12-19

Yoshifumi Ueshige, Kouichi Sakurai: A Proposal of One-Time Biometric Authentication. Security and Management 2006: 78-83

Jin Kwak, Keunwoo Rhee, Namje Park, Howon Kim, Seungjoo Kim, Kouichi Sakurai, Dongho Won: An RFID System Based MCLT System with Improved Privacy. EUC Workshops 2006: 579-590

Jong-Phil Yang, Kouichi Sakurai, Kyung Hyune Rhee: Distributing Security-Mediated PKI Revisited. EuroPKI 2006: 31-44

Jong-Phil Yang, Kyung Hyune Rhee, Kouichi Sakurai: A Proactive Secret Sharing for Server Assisted Threshold Signatures. HPCC 2006: 250-259

Jeong Ok Kwon, Kouichi Sakurai, Dong Hoon Lee: Efficient Password-Authenticated Key Exchange for Three-Party Secure Against Undetectable On-Line Dictionary Attacks. International Conference on Computational Science (1) 2006: 977-980

Hyung Chan Kim, Wook Shin, R. S. Ramakrishna, Kouichi Sakurai: Design and Implementation of an Extended Reference Monitor for Trusted Operating Systems. ISPEC 2006: 235-247

Satoshi Hada, Kouichi Sakurai: Ciphertext-Auditable Public Key Encryption. IWSEC 2006: 308-321

Kohei Tatara, Toshihiro Tabata, Kouichi Sakurai: Actively Modifying Control Flow of Program for Efficient Anormaly Detection. KES (2) 2006: 737-744

Kenji Imamoto, Kouichi Sakurai: Off-line verification of one-time ID in distributed environment. PST 2006: 60

Kenji Imamoto, Kouichi Sakurai: Enhanced Privacy in Key-Exchange Protocols by One-time ID. SecPerU 2006: 63-68

Yufeng Wang, Wendong Wang, Kouichi Sakurai, Yoshiaki Hori: On Studying P2P Topology Construction Based on Virtual Regions and Its Effect on Search Performance. UIC 2006: 1008-1018

Erwan Le Malécot, Masayoshi Kohara, Yoshiaki Hori, Kouichi Sakurai: Interactively combining 2D and 3D visualization for network traffic monitoring. VizSEC 2006: 123-127

Hiroshi Yoshiura, Kouichi Sakurai, Kai Rannenberg, Yuko Murayama, Shin-ichi Kawamura (Eds.): Advances in Information and Computer Security, First International Workshop on Security, IWSEC 2006, Kyoto, Japan, October 23-24, 2006, Proceedings. Lecture Notes in Computer Science 4266, Springer 2006, isbn 3-540-47699-7

Jeong Ok Kwon, Ik Rae Jeong, Kouichi Sakurai, Dong Hoon Lee: Password-Authenticated Multi-Party Key Exchange with Different Passwords. IACR Cryptology ePrint Archive 2006: 476 (2006)

Kenji Imamoto, Kouichi Sakurai: Design and Analysis of Diffie-Hellman-Based Key Exchange Using One-time ID by SVO Logic. Electr. Notes Theor. Comput. Sci. 135(1): 79-94 (2005)

Wonil Lee, Mridul Nandi, Palash Sarkar, Donghoon Chang, Sangjin Lee, Kouichi Sakurai: PGV-Style Block-Cipher-Based Hash Families and Black-Box Analysis. IEICE Transactions 88-A(1): 39-48 (2005)

Yasuyuki Sakai, Kouichi Sakurai: On the Vulnerability of Exponent Recodings for the Exponentiation against Side Channel Attacks. IEICE Transactions 88-A(1): 154-160 (2005)

Satoshi Koga, Kouichi Sakurai: Proposal and Analysis of a Distributed Online Certificate Status Protocol with Low Communication Cost. IEICE Transactions 88-A(1): 247-254 (2005)

Hyung Chan Kim, R. S. Ramakrishna, Kouichi Sakurai: A Collaborative Role-Based Access Control for Trusted Operating Systems in Distributed Environment. IEICE Transactions 88-A(1): 270-279 (2005)

Wook Shin, Jeong-Gun Lee, Hong Kook Kim, Kouichi Sakurai: Procedural Constraints in the Extended RBAC and the Coloured Petri Net Modeling. IEICE Transactions 88-A(1): 327-330 (2005)

Dong-Guk Han, Tetsuya Izu, Jongin Lim, Kouichi Sakurai: Side Channel Cryptanalysis on XTR Public Key Cryptosystem. IEICE Transactions 88-A(5): 1214-1223 (2005)

Shinsaku Kiyomoto, Toshiaki Tanaka, Kouichi Sakurai: Experimental Analysis of Guess-and-Determine Attacks on Clock-Controlled Stream Ciphers. IEICE Transactions 88-A(10): 2778-2791 (2005)

Junichiro Saito, Kouichi Sakurai: Grouping Proof for RFID Tags. AINA 2005: 621-624

Ryuzou Nishi, Hitoshi Morioka, Kouichi Sakurai: Trends and Issues for Security of Home-Network Based on Power Line Communication. AINA 2005: 655-660

Kenichi Takahashi, Kouichi Sakurai, Makoto Amamiya: A Framework for Protecting Private Information Through User-Trusted-Program and Its Realizability. EUC Workshops 2005: 433-442

Tatsuya Toyofuku, Toshihiro Tabata, Kouichi Sakurai: Program Obfuscation Scheme Using Random Numbers to Complicate Control Flow. EUC Workshops 2005: 916-925

Junichiro Saito, Kenji Imamoto, Kouichi Sakurai: Reassignment Scheme of an RFID Tag's Key for Owner Transfer. EUC Workshops 2005: 1303-1312

Mridul Nandi, Wonil Lee, Kouichi Sakurai, Sangjin Lee: Security Analysis of a 2/3-Rate Double Length Compression Function in the Black-Box Model. FSE 2005: 243-254

Kenji Imamoto, Jianying Zhou, Kouichi Sakurai: An Evenhanded Certified Email System for Contract Signing. ICICS 2005: 1-13

Guilin Wang, Feng Bao, Kenji Imamoto, Kouichi Sakurai: Generic, Optimistic, and Efficient Schemes for Fair Certified Email Delivery. ICICS 2005: 40-52

Yasuyuki Sakai, Kouichi Sakurai: Simple Power Analysis on Fast Modular Reduction with NIST Recommended Elliptic Curves. ICICS 2005: 169-180

Yong-Sork Her, Kenji Imamoto, Kouichi Sakurai: Some Remarks on Security of Receipt-Free E-auction. ICITA (2) 2005: 560-563

SangCheol Hwang, Namhoon Lee, Kouichi Sakurai, GungGil Park, Jaecheol Ryou: The Improved Risk Analysis Mechanism in the Practical Risk Analysis System. ICOIN 2005: 835-842

Kohei Tatara, Yoshiaki Hori, Kouichi Sakurai: Query Forwarding Algorithm Supporting Initiator Anonymity in GNUnet. ICPADS (2) 2005: 235-239

Ryuzou Nishi, Kouichi Sakurai: Group key distribution scheme for reducing required rekey message size. ICPADS (2) 2005: 280-284

Yoshifumi Ueshige, Kouichi Sakurai: A Study on a Framework of Online Biometric Authentication with Verification of Personal Repository. IWAP 2005: 155-168

Kenji Imamoto, Kouichi Sakurai: Analysis and Design for Private Message Board Systems. IEICE Transactions 87-A(1): 204-211 (2004)

Wonil Lee, Mridul Nandi, Palash Sarkar, Donghoon Chang, Sangjin Lee, Kouichi Sakurai: Pseudorandomness of SPN-Type Transformations. ACISP 2004: 212-223

Dong-Guk Han, Jongin Lim, Kouichi Sakurai: On Security of XTR Public Key Cryptosystems Against Side Channel Attacks. ACISP 2004: 454-465

Satoshi Koga, Kouichi Sakurai: A Merging Method of Certification Authorities Without Using Cross-Certifications. AINA (2) 2004: 174-177

Kenji Imamoto, Kouichi Sakurai: A Design of Diffie-Hellman Based Key Exchange Using One-time ID in Pre-shared Key Model. AINA (1) 2004: 327-333

Yasuyuki Sakai, Kouichi Sakurai: A New Attack with Side Channel Leakage During Exponent Recoding Computations. CHES 2004: 298-311

Junichiro Saito, Jae-Cheol Ryou, Kouichi Sakurai: Enhancing Privacy of Universal Re-encryption Scheme for RFID Tags. EUC 2004: 879-890

Satoshi Koga, Jae-Cheol Ryou, Kouichi Sakurai: Pre-production Methods of a Response to Certificates with the Common Status - Design and Theoretical Evaluation. EuroPKI 2004: 85-97

Toshihiro Tabata, Kouichi Sakurai: Design of Intrusion Detection System at User Level with System-Call Interposing. ICETE (2) 2004: 263-268

Dong-Guk Han, Tetsuya Izu, Jongin Lim, Kouichi Sakurai: Modified Power-Analysis Attacks on XTR and an Efficient Countermeasure. ICICS 2004: 305-317

Wonil Lee, Kouichi Sakurai, Seokhie Hong, Sangjin Lee: On the Pseudorandomness of a Modification of KASUMI Type Permutations. ICISC 2004: 313-329

Kwon Il Lee, Kouichi Sakurai, Jun Seok Lee, Jae-Cheol Ryou: A DRM Framework for Secure Distribution of Mobile Contents. ICOIN 2004: 905-914

Satoshi Koga, Kouichi Sakurai: A Distributed Online Certificate Status Protocol with a Single Public Key. Public Key Cryptography 2004: 389-401

Kohei Tatara, Toshihiro Tabata, Kouichi Sakurai: A Probabilistic Method for Detecting Anomalous Program Behavior. WISA 2004: 87-98

Manabu Iwanaga, Toshihiro Tabata, Kouichi Sakurai: Some Fitting of Naive Bayesian Spam Filtering for Japanese Environment. WISA 2004: 135-143

Kenji Imamoto, Kouichi Sakurai: Key-Exchange Protocol Using Pre-agreed Session-ID. WISA 2004: 375-387

Wonil Lee, Mridul Nandi, Palash Sarkar, Donghoon Chang, Sangjin Lee, Kouichi Sakurai: A Generalization of PGV-Hash Functions and Security Analysis in Black-Box Model. IACR Cryptology ePrint Archive 2004: 69 (2004)

Dong-Guk Han, Jongin Lim, Kouichi Sakurai: On security of XTR public key cryptosystems against Side Channel Attacks. IACR Cryptology ePrint Archive 2004: 123 (2004)

Mridul Nandi, Wonil Lee, Kouichi Sakurai, Sangjin Lee: Security Analysis of a 2/3-rate Double Length Compression Function in Black-Box Model. IACR Cryptology ePrint Archive 2004: 328 (2004)

Jae-Gwi Choi, Kouichi Sakurai, Ji-Hwan Park: Does It Need Trusted Third Party? Design of Buyer-Seller Watermarking Protocol without Trusted Third Party. ACNS 2003: 265-279

Yasuyuki Sakai, Kouichi Sakurai: Timing Attack against Implementation of a Parallel Algorithm for Modular Exponentiation. ACNS 2003: 319-330

Michael W. David, Kouichi Sakurai: Combating Cyber Terrorism: Countering Cyber Terrorist Advantages of Surprise and Anonymity. AINA 2003: 716-722

Kenji Imamoto, Kouichi Sakurai: Certified E-mail Systems Using Public Notice Board. DEXA Workshops 2003: 460-464

Kazuhide Fukushima, Kouichi Sakurai: A Software Fingerprinting Scheme for Java Using Classfiles Obfuscation. WISA 2003: 303-316

Jae-Gwi Choi, Kouichi Sakurai, Ji-Hwan Park: An Approach to Materialize Digital Fingerprinting Based on Proxy Signature Scheme. WWW (Posters) 2003

Katsuyuki Okeya, Kouichi Sakurai: On Insecurity of the Side Channel Attack Countermeasure Using Addition-Subtraction Chains under Distinguishability between Addition and Doubling. ACISP 2002: 420-435

Kouichi Sakurai, Tsuyoshi Takagi: On the Security of a Modified Paillier Public-Key Primitive. ACISP 2002: 436-448

Katsuyuki Okeya, Kouichi Sakurai: Fast Multi-scalar Multiplication Methods on Elliptic Curves with Precomputation Strategy Using Montgomery Trick. CHES 2002: 564-578

Soichi Furuya, Kouichi Sakurai: Risks with Raw-Key Masking - The Security Evaluation of 2-Key XCBC. ICICS 2002: 327-341

Kouichi Sakurai, Tsuyoshi Takagi: A Reject Timing Attackon an IND-CCA2 Public-Key Cryptosystem. ICISC 2002: 359-373

Kenji Imamoto, Kouichi Sakurai: A Certified E-mail System with Receiver's Selective Usage of Delivery Authority. INDOCRYPT 2002: 326-338

Katsuyuki Okeya, Kouichi Sakurai: A Second-Order DPA Attack Breaks a Window-Method Based Countermeasure against Side Channel Attacks. ISC 2002: 389-401

Yasuyuki Sakai, Kouichi Sakurai: Algorithms for Efficient Simultaneous Elliptic Scalar Multiplication with Reduced Joint Hamming Weight Representation of Scalars. ISC 2002: 484-500

Kouichi Sakurai, Tsuyoshi Takagi: New Semantically Secure Public-Key Cryptosystems from the RSA-Primitive. Public Key Cryptography 2002: 1-16

Soichi Furuya, Kouichi Sakurai: Single-Path Authenticated-Encryption Scheme Based on Universal Hashing. Selected Areas in Cryptography 2002: 94-109

Katsuyuki Okeya, Kouichi Sakurai: Efficient Elliptic Curve Cryptosystems from a Scalar Multiplication Algorithm with Recovery of the y-Coordinate on a Montgomery-Form Elliptic Curve. CHES 2001: 126-141

Johannes Buchmann, Kouichi Sakurai, Tsuyoshi Takagi: An IND-CCA2 Public-Key Cryptosystem with Fast Decryption. ICISC 2001: 51-71

Mototsugu Nishioka, Hisayoshi Satoh, Kouichi Sakurai: Design and Analysis of Fast Provably Secure Public-Key Cryptosystems Based on a Modular Squaring. ICISC 2001: 81-102

Katsuyuki Okeya, Kunihiko Miyazaki, Kouichi Sakurai: A Fast Scalar Multiplication Method with Randomized Projective Coordinates on a Montgomery-Form Elliptic Curve Secure against Side Channel Attacks. ICISC 2001: 428-439

Yasuyuki Sakai, Kouichi Sakurai: On the Power of Multidoubling in Speeding Up Elliptic Scalar Multiplication. Selected Areas in Cryptography 2001: 268-283

Daisuke Hirakiuchi, Kouichi Sakurai: English vs. Sealed Bid in Anonymous Electronic Auction Protocols. WETICE 2001: 171-176

Yasuyuki Sakai, Kouichi Sakurai: Efficient Scalar Multiplications on Elliptic Curves without Repeated Doublings and Their Practical Performance. ACISP 2000: 59-73

Kouichi Sakurai, Shingo Miyazaki: An Anonymous Electronic Bidding Protocol Based on a New Convertible Group Signature Scheme. ACISP 2000: 385-399

Katsuyuki Okeya, Kouichi Sakurai: Power Analysis Breaks Elliptic Curve Cryptosystems even Secure against the Timing Attack. INDOCRYPT 2000: 178-190

Katsuyuki Okeya, Hiroyuki Kurumatani, Kouichi Sakurai: Elliptic Curves with the Montgomery-Form and Their Cryptographic Applications. Public Key Cryptography 2000: 238-257

Toro Inoue, Kouichi Sakurai: Making Hash Functions From Block Ciphers Secure and Efficient by Using Convolutional Codes. Public Key Cryptography 2000: 391-404

Giovanni Di Crescenzo, Kouichi Sakurai, Moti Yung: On zero-knowledge proofs (extended abstract): ``from membership to decision''. STOC 2000: 255-264

Mike Burmester, Yvo Desmedt, Toshiya Itoh, Kouichi Sakurai, Hiroki Shizuya: Divertible and Subliminal-Free Zero-Knowledge Proofs for Languages. J. Cryptology 12(3): 197-223 (1999)

Shingo Miyazaki, Kouichi Sakurai, Moti Yung: On Threshold RSA-Signing with no Dealer. ICISC 1999: 197-207

Tetsuya Tamura, Kouichi Sakurai, Tsutomu Matsumoto: A Hardware-Oriented Algorithm for Computing in Jacobians and Its Implementation for Hyperelliptic Curve Cryptosystems. ICISC 1999: 221-235

Shingo Miyazaki, Ikuko Kuroda, Kouichi Sakurai: Toward Fair International Key Escrow. Public Key Cryptography 1999: 171-187

Eisuke Dannoura, Kouichi Sakurai: An Improvement on El-Yaniv-Fiat-Karp-Turpin's Money-Making Bi-Directional Trading Strategy. Inf. Process. Lett. 66(1): 27-33 (1998)

Kouichi Sakurai, Hiroki Shizuya: A Structural Comparison of the Computational Difficulty of Breaking Discrete Log Cryptosystems. J. Cryptology 11(1): 29-43 (1998)

Yasuyuki Sakai, Kouichi Sakurai: Design of Hyperelliptic Cryptosystems in Small Characteristic and a Software Implementation over F₂n. ASIACRYPT 1998: 80-94

Shingo Miyazaki, Kouichi Sakurai: A More Efficient Untraceable E-Cash System with Partially Blind Signatures Based on the Discrete Logarithm Problem. Financial Cryptography 1998: 296-308

Giovanni Di Crescenzo, Kouichi Sakurai, Moti Yung: Checking Programs Discreetly: Demonstrating Result-Correctness Efficiently while Concealing it. ISAAC 1998: 59-68

Yasuyuki Sakai, Kouichi Sakurai, Hirokazu Ishizuka: Secure Hyperelliptic Cryptosystems and Their Performances. Public Key Cryptography 1998: 164-181

Michael W. David, Kouichi Sakurai: Security Issues for Contactless Smart Cards. Public Key Cryptography 1998: 247-252

Giovanni Di Crescenzo, Kouichi Sakurai, Moti Yung: Result-Indistinguishable Zero-Knowledge Proofs: Increased Power and Constant-Round Protocols. STACS 1998: 511-521

Kouichi Sakurai: Practical Proofs of Knowledge without Relying on Theoretical Proofs of Membership on Languages. Theor. Comput. Sci. 181(2): 317-335 (1997)

Masahiro Mambo, Eiji Okamoto, Kouichi Sakurai: Protection of Data and Delegated Keys in Digital Distribution. ACISP 1997: 271-282

Kouichi Sakurai, Souichi Furuya: Improving Linear Cryptanalysis of LOKI91 by Probabilistic Counting Method. FSE 1997: 114-133

Giovanni Di Crescenzo, Kouichi Sakurai, Moti Yung: Zero-knowledge proofs of decision power: new protocols and optimal round-complexity. ICICS 1997: 17-27

Yasuyuki Sakai, Kouichi Sakurai, Hirokazu Ishizuka: On weak RSA-keys produced from Pretty Good Privacy. ICICS 1997: 314-324

Eisuke Dannoura, Kouichi Sakurai: On-Line Versus Off-Line in Money-Making Strategies with BROKERAGE. ISAAC 1997: 173-182

Kouichi Sakurai, Yoshinori Yamani, Shingo Miyazaki, Tohru Inoue: A Key Escrow System with Protecting User's Privacy by Blind Decoding. ISW 1997: 147-157

Akio Yanbe, Kouichi Sakurai: A Short Certificate of the Number of Universal Optimal Strategies for Stopping Simple Stochastic Games. Inf. Process. Lett. 57(1): 17-24 (1996)

Kouichi Sakurai: A Hidden Cryptographic Assunmption in No-Transferable Indentification Schemes. ASIACRYPT 1996: 159-172

Masahiro Mambo, Kouichi Sakurai, Eiji Okamoto: How to Utilize the Transformability of Digital Signatures for Solving the Oracle Problem. ASIACRYPT 1996: 322-333

Akio Yanbe, Kouichi Sakurai: On the Complexity of Computational Problems Associated with Simple Stochastic Games (Extended Abstract). COCOON 1996: 310-322

Mike Burmester, Yvo Desmedt, Toshiya Itoh, Kouichi Sakurai, Hiroki Shizuya, Moti Yung: A Progress Report on Subliminal-Free Channels. Information Hiding 1996: 157-168

Kouichi Sakurai, Yoshinori Yamane: Blind Decoding, Blind Undeniable Signatures, and Their Applications to Privacy Protection. Information Hiding 1996: 257-264

Kouichi Sakurai, Yuliang Zheng: Cryptographic Weaknesses in the Round Transformation Used in a Block Cipher with Provable Immunity Against Linear Cryptanalysis (Extended Abstract). ISAAC 1996: 376-385

Kouichi Sakurai: On Separating Proofs of Knowledge from Proofs of Membership of Languages and Its Application to Secure Identification Schemes (Extended Abstract). COCOON 1995: 496-509

Kouichi Sakurai, Hiroki Shizuya: Relationships Among the Computational Powers of Breaking Discrete Log Cryptosystems. EUROCRYPT 1995: 341-355

Kouichi Sakurai, Toshiya Itoh: Subliminal Channels for Signature Transfer and Their Application to Signature Distribution Schemes. AUSCRYPT 1992: 231-243

Kouichi Sakurai, Toshiya Itoh: On Bit Correlations Among Preimages of "Many to One" One-Way Functions. AUSCRYPT 1992: 435-446

Kouichi Sakurai, Toshiya Itoh: On the Discrepancy between Serial and Parallel of Zero-Knowledge Protocols (Extended Abstract). CRYPTO 1992: 246-259

Tatsuaki Okamoto, Kouichi Sakurai, Hiroki Shizuya: How Intractable Is the Discrete Logarithm for a General Finite Group? EUROCRYPT 1992: 420-428

Takeshi Saito, Kaoru Kurosawa, Kouichi Sakurai: 4 Move Perfect ZKIP of Knowledge with No Assumption. ASIACRYPT 1991: 321-330

Toshiya Itoh, Kouichi Sakurai: On the Complexity of Constant Round ZKIP of Possession of Knowledge. ASIACRYPT 1991: 331-345

Toshiya Itoh, Kouichi Sakurai, Hiroki Shizuya: Any Language in IP Has a Divertable ZKIP. ASIACRYPT 1991: 382-396

Tatsuaki Okamoto, Kouichi Sakurai: Efficient Algorithms for the Construction of Hyperelliptic Cryptosystems. CRYPTO 1991: 267-278

Hiroki Shizuya, Toshiya Itoh, Kouichi Sakurai: On the Complexity of Hyperelliptic Discrete Logarithm Problem. EUROCRYPT 1991: 337-351