Ryo FUJITA


Proposal of the Multivariate Public Key Cryptosystem Relying on the Difficulty of Factoring a Product of Two Large Prime Numbers
Shigeo TSUJII Kohtaro TADAKI Ryo FUJITA Masahito GOTAISHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2016/01/01
Vol. E99-A  No. 1  pp. 66-72
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
Multivariate Public Key CryptosystemPublic Key Cryptosystemprime factorizationGröbner basesrank attack
 Summary | Full Text:PDF(1.3MB)

Dually-Perturbed Matsumoto-Imai Signature (DPMS) Scheme
Masahito GOTAISHI Kohtaro TADAKI Ryo FUJITA Shigeo TSUJII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/06/01
Vol. E93-A  No. 6  pp. 1078-1085
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: Cryptography and Information Security
Keyword: 
post-quantum cryptosystemMultivariate Public Key Cryptosystemdigital signature
 Summary | Full Text:PDF(650.6KB)

Analysis of the Behavior of Cuprous Oxide by Acceleration Test for Evaluation of Heat and Fire Phenomena of Imperfectly Connected Electrical Terminal
Yoichi AOYAMA Hisa NUMA Ryo FUJITA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/07/01
Vol. E90-C  No. 7  pp. 1398-1404
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from ICEC2006))
Category: Contact Phenomena
Keyword: 
heat and fire phenomenaloose contactmicroslide motionimperfectly connected electrical terminalthe acceleration testcuprous oxide
 Summary | Full Text:PDF(1.1MB)

Low-Power and High-Speed Advantages of DRAM-Logic Integration for Multimedia Systems
Takao WATANABE Ryo FUJITA Kazumasa YANAGISAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1997/12/25
Vol. E80-C  No. 12  pp. 1523-1531
Type of Manuscript:  INVITED PAPER (Special Issue on Low-Power and High-Speed LSI Technologies)
Category: 
Keyword: 
DRAM-integrated chipembedded DRAMcomputer graphicsmain memory
 Summary | Full Text:PDF(703.7KB)