| 12079867 |
Electronic transaction system, transaction server, verification server, method of transaction, and program |
Toshiyuki Isshiki |
2024-09-03 |
| 11763383 |
Cryptocurrency system, terminal, server, trading method of cryptocurrency, and program |
— |
2023-09-19 |
| 11212112 |
System, data management method, and program |
Isamu Teranishi |
2021-12-28 |
| 10797867 |
System and method for electronic bidding |
Toshiyuki Isshiki |
2020-10-06 |
| 8583925 |
Mix-net system |
Jun Furukawa |
2013-11-12 |
| 8553889 |
Mix-net system |
Jun Furukawa |
2013-10-08 |
| 8223973 |
Mix-net system |
Jun Furukawa |
2012-07-17 |
| 7694880 |
Anonymous electronic voting system and anonymous electronic voting method |
Kengo Mori |
2010-04-13 |
| 7672460 |
Mix-net system |
Jun Furukawa |
2010-03-02 |
| 7376833 |
Anonymous decryption system, anonymous decryption method, and program |
Kengo Mori |
2008-05-20 |
| 7181405 |
Electronic tender system |
— |
2007-02-20 |
| 7117368 |
Anonymous participation authority management system |
— |
2006-10-03 |
| 7080045 |
Electronic revenue stamp issuing apparatus and method thereof and recording medium stored control program thereof |
— |
2006-07-18 |
| 7003541 |
Zero-knowledge proving system and method |
Jun Furukawa, Satoshi Obana |
2006-02-21 |
| 6754348 |
System and method for determining winner |
— |
2004-06-22 |
| 6595855 |
Electronic lottery system and its operating method and computer-readable recording medium in which the electronic lottery program code is stored |
— |
2003-07-22 |
| 6272225 |
Key recovery condition encryption and decryption apparatuses |
Hiroshi Miyauchi, Masashi Yamazaki, Seiichi Domyo, Hiroyoshi Tsuchiya, Seiko Kanno +4 more |
2001-08-07 |
| 6266421 |
Key recovery system and key recovery method |
Seiichi Domyo, Hiroyoshi Tsuchiya, Seiko Kanno, Hiroyuki Ando, Ichirou Morita +4 more |
2001-07-24 |
| 6185308 |
Key recovery system |
Hiroyuki Ando, Ichirou Morita, Yasutsugu Kuroda, Naoya Torii, Masashi Yamazaki +4 more |
2001-02-06 |
| 6169803 |
Encryption key processing system to be incorporated into data recovery system or key setting system for generating encryption key |
Hiroshi Miyauchi |
2001-01-02 |
| 6092051 |
Secure receipt-free electronic voting |
Joseph Kilian |
2000-07-18 |
| 5963649 |
Message authorization system for authorizing message for electronic document |
— |
1999-10-05 |
| 5682430 |
Secure anonymous message transfer and voting scheme |
Joseph Kilian |
1997-10-28 |
| 5495532 |
Secure electronic voting using partially compatible homomorphisms |
Joseph Kilian |
1996-02-27 |
