Akihiro YAMAMURA


More Efficient Threshold Signature Scheme in Gap Diffie-Hellman Group
DaeHun NYANG Akihiro YAMAMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/07/01
Vol. E92-A  No. 7  pp. 1720-1723
Type of Manuscript:  LETTER
Category: Cryptography and Information Security
Keyword: 
bilinear pairingdigital signaturethreshold signaturediscrete logarithm problem
 Summary | Full Text:PDF

Classification of Hash Functions Suitable for Real-Life Systems
Yasumasa HIRAI Takashi KUROKAWA Shin'ichiro MATSUO Hidema TANAKA Akihiro YAMAMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/01/01
Vol. E91-A  No. 1  pp. 64-73
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Hash Functions
Keyword: 
securityhash function
 Summary | Full Text:PDF

The Decision Diffie-Hellman Assumption and the Quadratic Residuosity Assumption
Taiichi SAITO Takeshi KOSHIBA Akihiro YAMAMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/01/01
Vol. E84-A  No. 1  pp. 165-171
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
decision Diffie-Hellman assumptionquadratic residuosity assumptionprobabilistic encryptionbit commitmentall-or-nothing disclosure of secrets
 Summary | Full Text:PDF