Yusuke NAITO


Security of Cryptosystems Using Merkle-Damgård in the Random Oracle Model
Yusuke NAITO Kazuki YONEYAMA Lei WANG Kazuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/01/01
Vol. E94-A  No. 1  pp. 57-70
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Public Key Cryptography
Keyword: 
indifferentiabilityMerkle-Damgård hash functionvariants of random oraclecryptosystems security
 Summary | Full Text:PDF(657.3KB)

A Strict Evaluation on the Number of Conditions for SHA-1 Collision Search
Jun YAJIMA Terutoshi IWASAKI Yusuke NAITO Yu SASAKI Takeshi SHIMOYAMA Thomas PEYRIN Noboru KUNIHIRO Kazuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/01/01
Vol. E92-A  No. 1  pp. 87-95
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Hash Function
Keyword: 
hash functioncollision searchSHA-1disturbance vector
 Summary | Full Text:PDF(330.1KB)

Improved Collision Search for Hash Functions: New Advanced Message Modification
Yusuke NAITO Kazuo OHTA Noboru KUNIHIRO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/01/01
Vol. E91-A  No. 1  pp. 46-54
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Hash Functions
Keyword: 
hash functioncollision attackcollision searchadvanced message modification
 Summary | Full Text:PDF(302.9KB)

Improved Collision Attacks on MD4 and MD5
Yu SASAKI Yusuke NAITO Noboru KUNIHIRO Kazuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/01/01
Vol. E90-A  No. 1  pp. 36-47
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Hash Functions
Keyword: 
message modificationcollision attackMD5MD4hash function
 Summary | Full Text:PDF(260.9KB)