Issued Patents 2005
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6940975 | Encryption/decryption apparatus, encryption/decryption method, and program storage medium therefor | Shinichi Kawamura | 2005-09-06 |
| 6917684 | Method of encryption and decryption with block number dependant key sets, each set having a different number of keys | Makoto Tatebayashi, Kaoru Yokota, Motoji Ohmori, Naoki Endo | 2005-07-12 |
| 6891950 | Extended key generator, encryption/decryption unit, extended key generation method, and storage medium | Motoji Oomori, Kaoru Yokota, Tsutomu Sekibe, Makoto Tatebayashi, Shinichi Kawamura | 2005-05-10 |
| 6876059 | Semiconductor integrated circuit device and method of manufacturing the same | — | 2005-04-05 |
| 6842523 | Encryption apparatus, cryptographic communication system, key recovery system, and storage medium | Akito Niwa, Shinichi Kawamura, Megumi Aoki, Toshiaki Saisho, Tatsuya Ishihara +1 more | 2005-01-11 |