IEICE Trans

Kazuo OHTA

Multi-Party Computation for Modular Exponentiation Based on Replicated Secret Sharing Kazuma OHARA Yohei WATANABE Mitsugu IWAMOTO Kazuo OHTA
Publication: Publication Date: 2019/09/01 Vol. E102-A No. 9 pp. 1079-1090 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Cryptography and Information Security Keyword: multi-party computation, modular exponentiation, replicated secret sharing,
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Shortening the Libert-Peters-Yung Revocable Group Signature Scheme by Using the Random Oracle Methodology Kazuma OHARA Keita EMURA Goichiro HANAOKA Ai ISHIDA Kazuo OHTA Yusuke SAKAI
Publication: Publication Date: 2019/09/01 Vol. E102-A No. 9 pp. 1101-1117 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Cryptography and Information Security Keyword: group signature, revocation, scalability,
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A New Type of Fault-Based Attack: Fault Behavior Analysis Yang LI Kazuo OHTA Kazuo SAKIYAMA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2013/01/01 Vol. E96-A No. 1 pp. 177-184 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Implementation Keyword: fault-based attack, AES, faulty behavior, physical attacks, masking,
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Ciphertext-Policy Delegatable Hidden Vector Encryption and Its Application Mitsuhiro HATTORI Takato HIRANO Takashi ITO Nori MATSUDA Takumi MORI Yusuke SAKAI Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2013/01/01 Vol. E96-A No. 1 pp. 53-67 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Public Key Based Protocols Keyword: hidden vector encryption, searchable encryption, pairing-based cryptography,
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Toward Effective Countermeasures against an Improved Fault Sensitivity Analysis Yang LI Kazuo OHTA Kazuo SAKIYAMA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2012/01/01 Vol. E95-A No. 1 pp. 234-241 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Implementation Keyword: side-channel attacks, fault sensitivity analysis, countermeasures, WDDL, AES,
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Meet-in-the-Middle (Second) Preimage Attacks on Two Double-Branch Hash Functions RIPEMD and RIPEMD-128 Lei WANG Yu SASAKI Wataru KOMATSUBARA Kazuo SAKIYAMA Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2012/01/01 Vol. E95-A No. 1 pp. 100-110 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Hash Function Keyword: RIPEMD, RIPEMD-128, meet-in-the-middle, one-message-word local collision,
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How to Shorten a Ciphertext of Reproducible Key Encapsulation Mechanisms in the Random Oracle Model Yusuke SAKAI Goichiro HANAOKA Kaoru KUROSAWA Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2011/06/01 Vol. E94-A No. 6 pp. 1293-1305 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: public key encryption, chosen-ciphertext security, key encapsulation mechanism,
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Universally Composable NBAC-Based Fair Voucher Exchange for Mobile Environments Kazuki YONEYAMA Masayuki TERADA Sadayuki HONGO Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2011/06/01 Vol. E94-A No. 6 pp. 1263-1273 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: fairness, fair exchange, electronic voucher, universal composability, non-blocking atomic commitment,
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Ultra-Wideband Array Antenna Utilizing Novel Scanning System with Tapped Delay Lines for Short Range Radar Fuminori SAKAI Kazuo OHTA Kunio SAWAYA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2011/05/01 Vol. E94-B No. 5 pp. 1194-1200 Type of Manuscript: Special Section PAPER (Special Section on Antenna and Propagation Technologies Contributing to Diversification of Wireless Technologies) Category: Antennas and Antenna Measurement Keyword: array antenna, delay line, impulse, scanning antenna, ultra-wideband,
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Security of Cryptosystems Using Merkle-Damgård in the Random Oracle Model Yusuke NAITO Kazuki YONEYAMA Lei WANG Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2011/01/01 Vol. E94-A No. 1 pp. 57-70 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Public Key Cryptography Keyword: indifferentiability, Merkle-Damgård hash function, variants of random oracle, cryptosystems security,
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Power Analysis against a DPA-Resistant S-Box Implementation Based on the Fourier Transform Yang LI Kazuo SAKIYAMA Shinichi KAWAMURA Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2011/01/01 Vol. E94-A No. 1 pp. 191-199 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Implementation Keyword: side channel attacks, masking, Fourier transform, s-box, probability density function,
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An Efficient Authentication for Lightweight Devices by Perfecting Zero-Knowledgeness Bagus SANTOSO Kazuo OHTA Kazuo SAKIYAMA Goichiro HANAOKA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2011/01/01 Vol. E94-A No. 1 pp. 92-103 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Identification Keyword: identification scheme, RFID, zero-knowledge, impersonation,
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Extension of Secret Handshake Protocols with Multiple Groups in Monotone Condition Yutaka KAWAI Shotaro TANNO Takahiro KONDO Kazuki YONEYAMA Kazuo OHTA Noboru KUNIHIRO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2010/06/01 Vol. E93-A No. 6 pp. 1122-1131 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Cryptography and Information Security Keyword: secret handshake with multiple groups, privacy preserving authentication, anonymity, monotone condition,
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Cryptanalysis of Two MD5-Based Authentication Protocols: APOP and NMAC Lei WANG Kazuo OHTA Yu SASAKI Kazuo SAKIYAMA Noboru KUNIHIRO
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 2010/05/01 Vol. E93-D No. 5 pp. 1087-1095 Type of Manuscript: Special Section PAPER (Special Section on Information and Communication System Security) Category: Keyword: authentication protocol, APOP, NMAC, MD5,
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On Clock-Based Fault Analysis Attack for an AES Hardware Using RSL Kazuo SAKIYAMA Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2010/01/01 Vol. E93-A No. 1 pp. 172-179 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Cryptanalysis Keyword: fault analysis, random switching logic, AES, clock-based fault analysis attack,
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Practical Password Recovery Attacks on MD4 Based Prefix and Hybrid Authentication Protocols Yu SASAKI Lei WANG Kazuo OHTA Kazumaro AOKI Noboru KUNIHIRO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2010/01/01 Vol. E93-A No. 1 pp. 84-92 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Hash Function Keyword: challenge and response, prefix, hybrid, password recovery attack, local collision, hash function, MD4,
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Leaky Random Oracle Kazuki YONEYAMA Satoshi MIYAGAWA Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2009/08/01 Vol. E92-A No. 8 pp. 1795-1807 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Theory Keyword: hash function, random oracle model, standard model, provable security, leakage,
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A Strict Evaluation on the Number of Conditions for SHA-1 Collision Search Jun YAJIMA Terutoshi IWASAKI Yusuke NAITO Yu SASAKI Takeshi SHIMOYAMA Thomas PEYRIN Noboru KUNIHIRO Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2009/01/01 Vol. E92-A No. 1 pp. 87-95 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Hash Function Keyword: hash function, collision search, SHA-1, disturbance vector,
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A New 'On the Fly' Identification Scheme: An Asymptoticity Trade-Off between ZK and Correctness Bagus SANTOSO Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2009/01/01 Vol. E92-A No. 1 pp. 122-136 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Secure Protocol Keyword: identification scheme, zero-knowledge, impersonation under serial active attack,
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Extended Password Recovery Attacks against APOP, SIP, and Digest Authentication Yu SASAKI Lei WANG Kazuo OHTA Noboru KUNIHIRO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2009/01/01 Vol. E92-A No. 1 pp. 96-104 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Hash Function Keyword: APOP, SIP, digest authentication, IV bridge, collision attack, hash function, MD5,
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Near-Collision Attacks on MD4: Applied to MD4-Based Protocols Lei WANG Kazuo OHTA Noboru KUNIHIRO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2009/01/01 Vol. E92-A No. 1 pp. 76-86 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Hash Function Keyword: near-collision, MD4, HMAC/NMAC, challenge and response, Hash(Password\|\|Challenge),
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FOREWORD Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2009/01/01 Vol. E92-A No. 1 pp. 1-2 Type of Manuscript: FOREWORD Category: Keyword:
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Attribute-Based Encryption with Partially Hidden Ciphertext Policies Takashi NISHIDE Kazuki YONEYAMA Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2009/01/01 Vol. E92-A No. 1 pp. 22-32 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Public Key Cryptography Keyword: attribute-based encryption, recipient anonymity, access control on encrypted data,
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New Message Differences for Collision Attacks on MD4 and MD5 Yu SASAKI Lei WANG Noboru KUNIHIRO Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2008/01/01 Vol. E91-A No. 1 pp. 55-63 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Hash Functions Keyword: collision attack, message difference, MD4, MD5, hash function,
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Provably Secure Multisignatures in Formal Security Model and Their Optimality Yuichi KOMANO Kazuo OHTA Atsushi SHIMBO Shinichi KAWAMURA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2008/01/01 Vol. E91-A No. 1 pp. 107-118 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Signatures Keyword: multisignatures, trapdoor one-way permutation (TOWP), claw-free permutation (CFP), provably secure, random oracle model,
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Factorization of Square-Free Integers with High Bits Known Bagus SANTOSO Noboru KUNIHIRO Naoki KANAYAMA Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2008/01/01 Vol. E91-A No. 1 pp. 306-315 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Cryptanalysis Keyword: factorization, lattice, Coppersmith's method,
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Improved Collision Search for Hash Functions: New Advanced Message Modification Yusuke NAITO Kazuo OHTA Noboru KUNIHIRO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2008/01/01 Vol. E91-A No. 1 pp. 46-54 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Hash Functions Keyword: hash function, collision attack, collision search, advanced message modification,
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Constant-Round Multiparty Computation for Interval Test, Equality Test, and Comparison Takashi NISHIDE Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2007/05/01 Vol. E90-A No. 5 pp. 960-968 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: multiparty computation, secret sharing, bitwise sharing, computing with encrypted data,
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Provably Secure Untraceable Electronic Cash against Insider Attacks Yoshikazu HANATANI Yuichi KOMANO Kazuo OHTA Noboru KUNIHIRO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2007/05/01 Vol. E90-A No. 5 pp. 980-991 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: blind multisignature, electronic cash, provable security, random oracle model, insider attacks,
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Improved Collision Attacks on MD4 and MD5 Yu SASAKI Yusuke NAITO Noboru KUNIHIRO Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2007/01/01 Vol. E90-A No. 1 pp. 36-47 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Hash Functions Keyword: message modification, collision attack, MD5, MD4, hash function,
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Universally Composable Hierarchical Hybrid Authenticated Key Exchange Haruki OTA Kazuki YONEYAMA Shinsaku KIYOMOTO Toshiaki TANAKA Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2007/01/01 Vol. E90-A No. 1 pp. 139-151 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Protocols Keyword: password, Diffie-Hellman, authenticated key exchange, universal composability, hierarchical hybrid construction, MAC (Message Authentication Code),
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Toward the Fair Anonymous Signatures: Deniable Ring Signatures Yuichi KOMANO Kazuo OHTA Atsushi SHIMBO Shinichi KAWAMURA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2007/01/01 Vol. E90-A No. 1 pp. 54-64 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Signatures Keyword: group signatures, ring signatures, DLP, CDH, DDH, random oracle model,
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Maurer-Yacobi ID-Based Key Distribution Revisited Noboru KUNIHIRO Wataru ABE Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2006/05/01 Vol. E89-A No. 5 pp. 1421-1424 Type of Manuscript: Special Section LETTER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: ID-based key distribution, baby step/giant step algorithm, Pohlig-Hellman algorithm,
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Taxonomical Security Consideration of OAEP Variants Yuichi KOMANO Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2006/05/01 Vol. E89-A No. 5 pp. 1233-1245 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: OAEP, SAEP, provably secure, reduction, Padding, random oracle,
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Visual Secret Sharing Schemes for Multiple Secret Images Allowing the Rotation of Shares Mitsugu IWAMOTO Lei WANG Kazuki YONEYAMA Noboru KUNIHIRO Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2006/05/01 Vol. E89-A No. 5 pp. 1382-1395 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: visual secret sharing schemes, visual cryptography, secret sharing schemes, multiple secret images, rotation of shares,
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Solutions to Security Problems of Rivest and Shamir's PayWord Scheme Norio ADACHI Satoshi AOKI Yuichi KOMANO Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/01/01 Vol. E88-A No. 1 pp. 195-202 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Application Keyword: micropayment, PayWord Scheme, digital signature, hash chain,
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Probabilistic Multi-Signature Schemes Using a One-Way Trapdoor Permutation Kei KAWAUCHI Yuichi KOMANO Kazuo OHTA Mitsuru TADA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2004/05/01 Vol. E87-A No. 5 pp. 1141-1153 Type of Manuscript: Special Section LETTER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: multi-signature scheme, probabilistic signature scheme, exact security, random oracle model,
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OAEP-ES--Methodology of Universal Padding Technique-- Yuichi KOMANO Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2004/01/01 Vol. E87-A No. 1 pp. 110-119 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Asymmetric Cipher Keyword: OAEP, PSS, universal padding, reduction, provably secure,
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Cryptographic Works of Dr. Kenji Koyama: In Memoria Noboru KUNIHIRO Kazuo OHTA Tatsuaki OKAMOTO Routo TERADA Yukio TSURUOKA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/01/01 Vol. E84-A No. 1 pp. 108-113 Type of Manuscript: INVITED PAPER (Special Section on Cryptography and Information Security) Category: Keyword: modern cryptography, key management, zero-knowledge proof, elliptic curve applications,
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E2--A New 128-Bit Block Cipher Masayuki KANDA Shiho MORIAI Kazumaro AOKI Hiroki UEDA Youichi TAKASHIMA Kazuo OHTA Tsutomu MATSUMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2000/01/25 Vol. E83-A No. 1 pp. 48-59 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: encryption algorithm, block cipher, E2, AES, design strategy,
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Multi-Signature Schemes Secure against Active Insider Attacks Kazuo OHTA Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/01/25 Vol. E82-A No. 1 pp. 21-31 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: digital signature, Fiat-Shamir scheme, Schnorr scheme, random oracle model, zero-knowledge interactive proof, provable security,
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Remarks on Transformable Digital Signatures Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/05/25 Vol. E81-A No. 5 pp. 814-817 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: digital signature, blind decryption, oracle attack, transformability, RSA scheme, ElGamal scheme, commutative random-self reducible problem,
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Linear Cryptanalysis of FEAL Kazumaro AOKI Kazuo OHTA Shiho MORIAI Mitsuru MATSUI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/01/25 Vol. E81-A No. 1 pp. 88-97 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: linear cryptanalysis, 1R-attack, 2R-attack, effective key bits, effective text bits, FEAL,
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One-Time Zero-Knowledge Authentications and Their Applications to Untraceable Electronic Cash Tatsuaki OKAMOTO Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/01/25 Vol. E81-A No. 1 pp. 2-10 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: electronic cash, zero-knowledge proofs, untraceability, off-line cash,
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Security of the Extended Fiat-Shamir Schemes Kazuo OHTA Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/01/25 Vol. E81-A No. 1 pp. 65-71 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: the Fiat-Shamir scheme, zero-knowledge proof, identification, no-transferable information, digital signatures,
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Collision Search of a Hash Function by Using Random Mapping Hikaru MORITA Hideki ODAGI Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/01/25 Vol. E81-A No. 1 pp. 35-40 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: hash function, collision, pseudo random function, random mapping,
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Strict Evaluation of the Maximum Average of Differential Probability and the Maximum Average of Linear Probability Kazumaro AOKI Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1997/01/25 Vol. E80-A No. 1 pp. 2-8 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: Feistel cipher, differential cryptanalysis, linear cryptanalysis, differential probability, potential of linear approximate hull,
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Key-Dependency of Linear Probability of RC5 Shiho MORIAI Kazumaro AOKI Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1997/01/25 Vol. E80-A No. 1 pp. 9-18 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: RC5, linear cryptanalysis, linear probability, weak key, key-dependency,
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The Best Linear Expression Search of FEAL Shiho MORIAI Kazumaro AOKI Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1996/01/25 Vol. E79-A No. 1 pp. 2-11 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: Linear Cryptanalysis, best linear expression, FEAL, search algorithm,
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Differential-Linear Cryptanalysis of FEAL-8 Kazumaro AOKI Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1996/01/25 Vol. E79-A No. 1 pp. 20-27 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: code break, block cipher, differential-linear cryptanalysis, FEAL,
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New Proposal and Comparison of Closure Tests--More Efficient than the CRYPTO'92 Test for DES-- Hikaru MORITA Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1994/01/25 Vol. E77-A No. 1 pp. 15-19 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: switching closure test (SCT), cycling closure test (CCT), meet-in-the-middle closure test (MCT), DES cipher,
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Message Authentication Codes and Differential Attack Kazuo OHTA Mitsuru MATSUI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1994/01/25 Vol. E77-A No. 1 pp. 8-14 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword:
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A Switching Closure Test to Analyze Cryptosystems Hikaru MORITA Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1992/04/25 Vol. E75-A No. 4 pp. 498-503 Type of Manuscript: Special Section PAPER (Special Issue on Discrete Mathematics and Its Application) Category: Keyword: cryptosystem, group, closure test, meet-in-the-middle technique, DES cipher, RSA scheme, birth-day paradox,
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Interactive Bi-proof Systems and Undeniable Signature Schemes Atsushi FUJIOKA Tatsuaki OKAMOTO Kazuo OHTA
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 1992/01/25 Vol. E75-D No. 1 pp. 102-109 Type of Manuscript: Special Section PAPER (Special Section on Theoretical Foundations of Computing) Category: Keyword: interactive proof system, random self-reducibility, minimum knowledgeness, digital signature,
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Abuses of Undeniable Signatures and Their Countermeasures Kazuo OHTA Tatsuaki OKAMOTO Atsushi FUJIOKA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1991/08/25 Vol. E74-A No. 8 pp. 2109-2113 Type of Manuscript: Special Section PAPER (Special Issue on Cryptography and Information Security) Category: Keyword:
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Membership Authentication for Hierarchical Multigroups Using a Master Secret Key Kazuo OHTA Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1990/07/25 Vol. E73-E No. 7 pp. 1107-1110 Type of Manuscript: Special Section PAPER (Special Issue on Cryptography and Information Security) Category: Authentication Techniques Keyword:
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The Construction of Collision Messages for Hash Functions Masahiko IWATA Kazuo OHTA Shoji MIYAGUCHI
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1990/07/25 Vol. E73-E No. 7 pp. 1100-1106 Type of Manuscript: Special Section PAPER (Special Issue on Cryptography and Information Security) Category: Authentication Techniques Keyword:
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