Mototsugu NISHIOKA


Secure Public-Key Encryption from Random Oracle Transformation
Mototsugu NISHIOKA Naohisa KOMATSU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/04/01
Vol. E94-A  No. 4  pp. 1091-1105
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
Public-key encryptionRandom oracleInstantiation
 Summary | Full Text:PDF(355.4KB)

Public-Key Encryptions with Invariant Security Reductions in the Multi-User Setting
Mototsugu NISHIOKA Naohisa KOMATSU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/02/01
Vol. E94-A  No. 2  pp. 735-760
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
public-key encryptionsecurity reductionmulti-user setting
 Summary | Full Text:PDF(508KB)

Identity-Based Encryptions with Tight Security Reductions to the BDH Problem
Mototsugu NISHIOKA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/05/01
Vol. E91-A  No. 5  pp. 1241-1252
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
identity-based encryptionsecurity reductionbilinear Diffie-Hellman problem
 Summary | Full Text:PDF(230.3KB)

A Note on the Random Oracle Methodology
Mototsugu NISHIOKA Naohisa KOMATSU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/02/01
Vol. E91-A  No. 2  pp. 650-663
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
random oracle modelstandard computational modelsignature schemeencryption scheme
 Summary | Full Text:PDF(286.8KB)