Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7649991 | Method of a public key encryption and a cypher communication both secure against a chosen-ciphertext attack | Yoichi Seto, Hisayoshi Satoh | 2010-01-19 |
| 7164765 | Method of a public key encryption and a cypher communication both secure against a chosen-ciphertext attack | Yoichi Seto, Hisayoshi Satoh | 2007-01-16 |
| 6512829 | Key distribution method and system in secure broadcast communication | Hisashi Umeki, Susumu Matsui | 2003-01-28 |
| 6269445 | Electronic shopping method, electronic shopping system and document authenticating method relating thereto | Satoshi Miyazaki | 2001-07-31 |
| 6041408 | Key distribution method and system in secure broadcast communication | Hisashi Umeki, Susumu Matsui | 2000-03-21 |
| 5995626 | Electronic shopping method, electronic shopping system and document authenticating method relating thereto | Satoshi Miyazaki | 1999-11-30 |
| 5754656 | Electronic shopping method, electronic shopping system and document authenticating method relating thereto | Satoshi Miyazaki | 1998-05-19 |