Issued Patents All Time
Showing 126–144 of 144 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7246247 | Secure device | Kazuo Sakushima, Makoto Tatebayashi | 2007-07-17 |
| 7188224 | Content duplication management system and networked apparatus | Yuusaku Ohta, Hiroki Yamauchi, Masaya Miyazaki, Toshihisa Abe | 2007-03-06 |
| 7167559 | Information security device, exponentiation device, modular exponentiation device, and elliptic curve exponentiation device | Takatoshi Ono, Toshihisa Nakano | 2007-01-23 |
| 6963644 | Multi-word arithmetic device for faster computation of cryptosystem calculations | Yasuo Okumura, Takatoshi Ono | 2005-11-08 |
| 6813357 | Exclusive key sharing method | Jun Anzai, Tsutomu Matsumoto | 2004-11-02 |
| 6684210 | File managing system, file management apparatus, file management method, and program storage medium | Hideaki Takechi, Hiroyuki Iitsuka, Masazumi Yamada | 2004-01-27 |
| 6567832 | Device, method, and storage medium for exponentiation and elliptic curve exponentiation | Takatoshi Ono | 2003-05-20 |
| 6463151 | Data transmission method, data receiving method, data transmission system and program recording medium | Hiroyuki Iitsuka, Masazumi Yamada, Hideaki Takechi | 2002-10-08 |
| 6459792 | Block cipher using key data merged with an intermediate block generated from a previous block | Motoji Ohmori, Makoto Tatebayashi, Masakatsu Maruyama | 2002-10-01 |
| 6366940 | High-speed modular multiplication apparatus achieved in small circuit | Takatoshi Ono, Hiroshi Kashiwa | 2002-04-02 |
| 6289314 | Pay information providing system for descrambling information from plural sources and rescrambling the information before sending to a terminal or terminals | Makoto Tatebayashi, Motoji Ohmori | 2001-09-11 |
| 6289102 | Apparatus and method for preventing unauthorized use of information recorded on an information recording medium | Hiroshi Ueda, Yoshihisa Fukushima, Motoshi Ito, Makoto Tatebayashi | 2001-09-11 |
| 6058476 | Encryption apparatus for ensuring security in communication between devices | Syunji Harada, Makoto Tatebayashi | 2000-05-02 |
| 6049611 | One-way data conversion apparatus and device authentication system | Makoto Tatebayashi, Koichi Hirayama | 2000-04-11 |
| 6034618 | Device authentication system which allows the authentication function to be changed | Makoto Tatebayashi, Yoshihisa Fukushima, Koichi Hirayama, Atsushi Ishihara | 2000-03-07 |
| 6028937 | Communication device which performs two-way encryption authentication in challenge response format | Makoto Tatebayashi, Syunji Harada, Motoji Omori, Masayuki Kozuka, Kazuhiko Yamauchi | 2000-02-22 |
| 5790667 | Personal authentication method | Motoji Omori, Makoto Tatebayashi | 1998-08-04 |
| 5351299 | Apparatus and method for data encryption with block selection keys and data encryption keys | Makoto Tatebayashi | 1994-09-27 |
| 5199070 | Method for generating a public key | Shunji Harada, Makoto Tatebayashi | 1993-03-30 |