Yuichi KOMANO


BS-CPA: Built-In Determined Sub-Key Correlation Power Analysis
Yuichi KOMANO Hideo SHIMIZU Shinichi KAWAMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/09/01
Vol. E93-A  No. 9  pp. 1632-1638
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
side channel attackspower analysisCPAHamming weight and Hamming distance modelsDPA contest
 Summary | Full Text:PDF(426.9KB)

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: 
multisignaturestrapdoor one-way permutation (TOWP)claw-free permutation (CFP)provably securerandom oracle model
 Summary | Full Text:PDF(346.7KB)

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 multisignatureelectronic cashprovable securityrandom oracle modelinsider attacks
 Summary | Full Text:PDF(279.5KB)

Fair Exchange of Signatures with Multiple Signers
Yuichi KOMANO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/05/01
Vol. E90-A  No. 5  pp. 969-979
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
fair exchange of signaturesconcurrent signaturesmultisignaturesprovably securerandom oracle model
 Summary | Full Text:PDF(218.5KB)

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 signaturesring signaturesDLPCDHDDHrandom oracle model
 Summary | Full Text:PDF(284.1KB)

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: 
OAEPSAEPprovably securereductionPaddingrandom oracle
 Summary | Full Text:PDF(287.8KB)

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: 
micropaymentPayWord Schemedigital signaturehash chain
 Summary | Full Text:PDF(241.6KB)

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 schemeprobabilistic signature schemeexact securityrandom oracle model
 Summary | Full Text:PDF(317.6KB)

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: 
OAEPPSSuniversal paddingreductionprovably secure
 Summary | Full Text:PDF(318.2KB)