Akira OTSUKA


A Theoretical Framework for Constructing Matching Algorithms Secure against Wolf Attack
Manabu INUMA Akira OTSUKA Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2013/02/01
Vol. E96-D  No. 2  pp. 357-364
Type of Manuscript:  PAPER
Category: Image Recognition, Computer Vision
Keyword: 
biometricswolf attackwolf attack probabilitymatching algorithmsecurity
 Summary | Full Text:PDF(292.5KB)

Universally Composable and Statistically Secure Verifiable Secret Sharing Scheme Based on Pre-Distributed Data
Rafael DOWSLEY Jorn MULLER-QUADE Akira OTSUKA Goichiro HANAOKA Hideki IMAI Anderson C.A. NASCIMENTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/02/01
Vol. E94-A  No. 2  pp. 725-734
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
verifiable secret sharingdishonest majoritypre-distributed dataunconditional securityuniversal composable
 Summary | Full Text:PDF(553.4KB)

Enhanced Cancelable Biometrics for Online Signature Verification
Daigo MURAMATSU Manabu INUMA Junji SHIKATA Akira OTSUKA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/06/01
Vol. E93-A  No. 6  pp. 1254-1259
Type of Manuscript:  LETTER
Category: Analog Signal Processing
Keyword: 
template protectioncancelable biometricsonline signature verificationbiometrics
 Summary | Full Text:PDF(434.6KB)

Analysis of Mean Waiting Time for Delivery of a Message in Mobile Multi-Hop Networks
Keisuke NAKANO Kazuyuki MIYAKITA Akira OTSUKA Masakazu SENGOKU Shoji SHINODA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/09/01
Vol. E92-A  No. 9  pp. 2236-2247
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: Multi-hop Wireless Network
Keyword: 
mobile multi-hop networkconnectivitymobilityepidemic routing
 Summary | Full Text:PDF(720.8KB)

Wolf Attack Probability: A Theoretical Security Measure in Biometric Authentication Systems
Masashi UNE Akira OTSUKA Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2008/05/01
Vol. E91-D  No. 5  pp. 1380-1389
Type of Manuscript:  Special Section PAPER (Special Section on Information and Communication System Security)
Category: Biometrics
Keyword: 
biometric authentication systembrute-force attackfinger-vein-pattern based algorithmminutiae-matching algorithmwolf attack probability
 Summary | Full Text:PDF(724.7KB)

A Provably Secure Refreshable Partially Anonymous Token and Its Applications
Rie SHIGETOMI Akira OTSUKA Jun FURUKAWA Keith MARTIN Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/05/01
Vol. E89-A  No. 5  pp. 1396-1406
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
anonymous credentialrefreshable tokensanonymityprivacy protection
 Summary | Full Text:PDF(280KB)

An Unconditionally Secure Electronic Cash Scheme with Computational Untraceability
Akira OTSUKA Goichiro HANAOKA Junji SHIKATA Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/01/01
Vol. E85-A  No. 1  pp. 140-148
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
electronic cashinformation theoretic securityunconditionally secure signature
 Summary | Full Text:PDF(281.3KB)