Issued Patents All Time
Showing 76–92 of 92 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6182215 | Information devices which select and use one out of plurality of encryption utilization protocols for protecting copyrights of digital productions | Syunji Harada | 2001-01-30 |
| 6160890 | Secret key transfer method which is highly secure and can restrict the damage caused when the secret key is leaked or decoded | Motoji Ohmori, Takehisa Kato, Naoki Endoh, Koichi Hirayama | 2000-12-12 |
| 6151394 | Encrypted communication system that limits the damage caused when a secret key has been leaked | Yoshihisa Fukushima, Takehisa Kato, Naoki Endoh, Koichi Hirayama | 2000-11-21 |
| 6058476 | Encryption apparatus for ensuring security in communication between devices | Natsume Matsuzaki, Syunji Harada | 2000-05-02 |
| 6049611 | One-way data conversion apparatus and device authentication system | Natsume Matsuzaki, Koichi Hirayama | 2000-04-11 |
| 6047103 | Data transmitter, data transmitting method, data receiver, information processor, and information recording medium | Kazuhiko Yamauchi, Hiroshi Ueda, Masayuki Kozuka, Yoshihisa Fukushima, Syunji Harada +1 more | 2000-04-04 |
| 6034618 | Device authentication system which allows the authentication function to be changed | Natsume Matsuzaki, Yoshihisa Fukushima, Koichi Hirayama, Atsushi Ishihara | 2000-03-07 |
| 6028937 | Communication device which performs two-way encryption authentication in challenge response format | Natsume Matsuzaki, Syunji Harada, Motoji Omori, Masayuki Kozuka, Kazuhiko Yamauchi | 2000-02-22 |
| 6009174 | Secret key transfer method which is highly secure and can restrict the damage caused when the secret key is leaked or decoded | Motoji Ohmori, Takehisa Kato, Naoki Endoh, Koichi Hirayama | 1999-12-28 |
| 5825885 | Bit agitator | Atsuko Miyaji, Motoji Omori | 1998-10-20 |
| 5790667 | Personal authentication method | Motoji Omori, Natsume Matsuzaki | 1998-08-04 |
| 5751810 | Bit agitator | Atsuko Miyaji, Motoji Omori | 1998-05-12 |
| 5442707 | Method for generating and verifying electronic signatures and privacy communication using elliptic curves | Atsuko Miyaji | 1995-08-15 |
| 5351297 | Method of privacy communication using elliptic curves | Atsuko Miyaji | 1994-09-27 |
| 5351299 | Apparatus and method for data encryption with block selection keys and data encryption keys | Natsume Matsuzaki | 1994-09-27 |
| 5272755 | Public key cryptosystem with an elliptic curve | Atsuko Miyaji | 1993-12-21 |
| 5199070 | Method for generating a public key | Natsume Matsuzaki, Shunji Harada | 1993-03-30 |