Kunio KOBAYASHI


An Auction Protocol Preserving Privacy of Losing Bids with a Secure Value Comparison Scheme
Koji CHIDA Kunio KOBAYASHI Hikaru MORITA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/01/01
Vol. E87-A  No. 1  pp. 173-181
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Applications
Keyword: 
sealed-bid auctionvalue comparisoncollision-resistant functiondecision Diffie-Hellman problem
 Summary | Full Text:PDF(270.9KB)

Multiple Scalar-Multiplication Algorithm over Elliptic Curve
Kunio KOBAYASHI Hikaru MORITA Mitsuari HAKUTA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2001/02/01
Vol. E84-D  No. 2  pp. 271-276
Type of Manuscript:  PAPER
Category: Applications of Information Security Techniques
Keyword: 
multiple scalar multiplicationelliptic curve
 Summary | Full Text:PDF(393.4KB)

Efficient Sealed-Bid Auction by Using One-Way Functions
Kunio KOBAYASHI Hikaru MORITA Koutarou SUZUKI Mitsuari HAKUTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/01/01
Vol. E84-A  No. 1  pp. 289-294
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
sealed-bid auctionquantitative competitionone-way functionbit commitment
 Summary | Full Text:PDF(216.9KB)

An Electronic Soccer Lottery System that Uses Bit Commitment
Kunio KOBAYASHI Hikaru MORITA Mitsuari HAKUTA Takanori NAKANOWATARI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2000/05/25
Vol. E83-D  No. 5  pp. 980-987
Type of Manuscript:  Special Section PAPER (Special Issue on Next Generation Internet Technologies and Their Applications)
Category: 
Keyword: 
soccer lotterysecuritybit commitmenthash functiondigital signaturebulletin board
 Summary | Full Text:PDF(594.4KB)

The Best Differential Characteristic Search of FEAL
Kazumaro AOKI Kunio KOBAYASHI Shiho MORIAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/01/25
Vol. E81-A  No. 1  pp. 98-104
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
search algorithmdifferential cryptanalysisbest differential characteristicFEAL
 Summary | Full Text:PDF(558.7KB)