Kazukuni KOBARA


Threshold Anonymous Password-Authenticated Key Exchange Secure against Insider Attacks
SeongHan SHIN  Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2011/11/01
Vol. E94-D  No. 11  pp. 2095-2110
Type of Manuscript: Special Section PAPER (Special Section on Information and Communication System Security)
Category: 
Keyword: 
password-authenticated key exchangepasswordson-line/off-line dictionary attacksanonymityinsider attacksprovable security
  Summary |  Full Text:PDF (695.2KB)

Security Analysis of Two Augmented Password-Authenticated Key Exchange Protocols
SeongHan SHIN  Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/11/01
Vol. E93-A  No. 11  pp. 2092-2095
Type of Manuscript: Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Cryptography and Information Security
Keyword: 
PAKEon-line/off-line dictionary attacksaugmented PAKEserver-compromise impersonation attacksIEEE P1363.2 working group
  Summary |  Full Text:PDF (91.6KB)

An RSA-Based Leakage-Resilient Authenticated Key Exchange Protocol Secure against Replacement Attacks, and Its Extensions
SeongHan SHIN  Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/06/01
Vol. E93-A  No. 6  pp. 1086-1101
Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: Cryptography and Information Security
Keyword: 
authenticated key exchangepasswordson-line/off-line dictionary attacksRSAleakage of stored secretsreplacement attacks
  Summary |  Full Text:PDF (7.4MB)

Anonymous Password-Authenticated Key Exchange: New Construction and Its Extensions
SeongHan SHIN  Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/01/01
Vol. E93-A  No. 1  pp. 102-115
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Secure Protocol
Keyword: 
authenticated key exchangepasswordson-line/off-line dictionary attackspassword-authenticated key exchangeanonymityefficiencyprovable security
  Summary |  Full Text:PDF (451.2KB)

A Secure Construction for Threshold Anonymous Password-Authenticated Key Exchange
SeongHan SHIN  Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/11/01
Vol. E91-A  No. 11  pp. 3312-3324
Type of Manuscript: PAPER
Category: Cryptography and Information Security
Keyword: 
password authenticationkey exchangePAKEanonymityprovable security
  Summary |  Full Text:PDF (401.3KB)

A New Security Architecture for Personal Networks and Its Performance Evaluation
SeongHan SHIN  Hanane FATHI  Kazukuni KOBARA  Neeli R. PRASAD  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/07/01
Vol. E91-B  No. 7  pp. 2255-2264
Type of Manuscript: PAPER
Category: Network
Keyword: 
personal networksleakage of stored secretsauthentication and key exchangeleakage-resilienceforward secrecysecurity architectureperformance evaluation
  Summary |  Full Text:PDF (556KB)

Lightweight Privacy-Preserving Authentication Protocols Secure against Active Attack in an Asymmetric Way
Yang CUI  Kazukuni KOBARA  Kanta MATSUURA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2008/05/01
Vol. E91-D  No. 5  pp. 1457-1465
Type of Manuscript: Special Section PAPER (Special Section on Information and Communication System Security)
Category: Authentication
Keyword: 
lightweight protocolasymmetric authenticationprivacy-preservingactive attack
  Summary |  Full Text:PDF (292.2KB)

RSA-Based Password-Authenticated Key Exchange, Revisited
SeongHan SHIN  Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2008/05/01
Vol. E91-D  No. 5  pp. 1424-1438
Type of Manuscript: Special Section PAPER (Special Section on Information and Communication System Security)
Category: Key Management
Keyword: 
password authenticationkey exchangeRSAon-line/off-line attackse-residue attacksprovable security
  Summary |  Full Text:PDF (406.4KB)

A Secure Authenticated Key Exchange Protocol for Credential Services
SeongHan SHIN  Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/01/01
Vol. E91-A  No. 1  pp. 139-149
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Protocols
Keyword: 
password authenticationkey exchangeleakage of stored secretsroaming protocolpassword-enabled PKIcredential servicesprovable security
  Summary |  Full Text:PDF (267.1KB)

IVs to Skip for Immunizing WEP against FMS Attack
Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/01/01
Vol. E91-B  No. 1  pp. 164-171
Type of Manuscript: PAPER
Category: Fundamental Theories for Communications
Keyword: 
RC4WEPIEEE802.11WLANFMS attack
  Summary |  Full Text:PDF (1.4MB)

An Efficient and Leakage-Resilient RSA-Based Authenticated Key Exchange Protocol with Tight Security Reduction
SeongHan SHIN  Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/02/01
Vol. E90-A  No. 2  pp. 474-490
Type of Manuscript: PAPER
Category: Information Security
Keyword: 
authenticated key exchangepasswordson-line and off-line dictionary attacksRSAleakage of stored secretsefficiencyperfect forward secrecy
  Summary |  Full Text:PDF (322.7KB)

Key-Dependent Weak IVs and Weak Keys in WEP--How to Trace Conditions Back to Their Patterns--
Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/08/01
Vol. E89-A  No. 8  pp. 2198-2206
Type of Manuscript: PAPER
Category: Information Security
Keyword: 
RC4WEPIEEE802.11WLANFMS attack
  Summary |  Full Text:PDF (202.2KB)

A Simple Leakage-Resilient Authenticated Key Establishment Protocol, Its Extensions, and Applications
SeongHan SHIN  Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/03/01
Vol. E88-A  No. 3  pp. 736-754
Type of Manuscript: PAPER
Category: Information Security
Keyword: 
entropy of passwordson-line and off-line attacksauthenticationkey establishment protocolleakage of stored secretsproactive securityDDH problemstandard model
  Summary |  Full Text:PDF (524.3KB)

Best Truncated and Impossible Differentials of Feistel Block Ciphers with S-D (Substitution and Diffusion) or D-S Round Functions
Makoto SUGITA  Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/01/01
Vol. E86-A  No. 1  pp. 2-12
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Symmetric Ciphers and Hash Functions
Keyword: 
block cipher camelliatruncated differential cryptanalysisimpossible differential cryptanalysis
  Summary |  Full Text:PDF (923.8KB)

Pretty-Simple Password-Authenticated Key-Exchange Protocol Proven to be Secure in the Standard Model
Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/10/01
Vol. E85-A  No. 10  pp. 2229-2237
Type of Manuscript: Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Information Security
Keyword: 
entropy of passwordskey exchangeauthenticationDDH problemstandard model
  Summary |  Full Text:PDF (275.2KB)

Semantically Secure McEliece Public-Key Cryptosystem
Kazukuni KOBARA  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/01/01
Vol. E85-A  No. 1  pp. 74-83
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
McEliece public-key cryptosystemsemantic securityprovable securityconversioncoding theory
  Summary |  Full Text:PDF (260.6KB)