Issued Patents All Time
Showing 101–125 of 125 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7706528 | Prime calculating apparatus, key issuing system, and prime calculation method | Motoji Ohmori | 2010-04-27 |
| 7702109 | Content recording/reproducing system, distribution device, reproducing device, and recording device | Masato Yamamichi, Motoji Ohmori, Masaya Yamamoto, Makoto Tatebayashi | 2010-04-20 |
| 7664260 | Signature generation device, key generation device, and signature generation method | Shingo Hasegawa, Shuji Isobe, Motoji Ohmori, Hiroki Shizuya | 2010-02-16 |
| 7634084 | Prime calculation device, method, and key issuing system | Motoji Ohmori | 2009-12-15 |
| 7617536 | Unauthorized device detection device, unauthorized device detection system, unauthorized device detection method, program, recording medium, and device information update method | Masao Nonaka, Toshihisa Nakano, Motoji Ohmori, Takeshi Gomi, Kazukuni Kobara +1 more | 2009-11-10 |
| 7603554 | Encryption communication system | Masato Yamamichi, Motoji Ohmori, Makoto Tatebayashi | 2009-10-13 |
| 7549061 | Unauthorized contents detection system | Masao Nonaka, Toshihisa Nakano, Kaoru Yokota, Motoji Ohmori, Masaya Miyazaki +3 more | 2009-06-16 |
| 7486789 | Device and method for calculation on elliptic curve | Motoji Ohmori | 2009-02-03 |
| 7471792 | Key agreement system, shared-key generation apparatus, and shared-key recovery apparatus | Masato Yamamichi, Motoji Ohmori, Makoto Tatebayashi | 2008-12-30 |
| 7457410 | Transmission/reception system | Hiroki Yamauchi, Natsume Matsuzaki, Yuusaku Ohta | 2008-11-25 |
| 7441117 | Group formation/management system, group management device, and member device | Natsume Matsuzaki, Toshihisa Abe, Toshihisa Nakano, Masaya Miyazaki | 2008-10-21 |
| 7434898 | Computer system, computer program, and addition method | Motoji Ohmori, Hiroyuki Shizuya, Masahiro Mambo, Masato Yamamichi | 2008-10-14 |
| 7426494 | Rental system | Motoji Ohmori, Makoto Tatebayashi | 2008-09-16 |
| 7394902 | Encryption apparatus, decryption apparatus and encryption system | Masato Yamamichi, Motoji Ohmori, Makoto Tatebayashi | 2008-07-01 |
| 7386618 | Distribution system, distribution apparatus, and reception apparatus for distributing contents having usage expiry | Motoji Ohmori, Makoto Tatebayashi, Masaya Yamamoto | 2008-06-10 |
| 7349396 | Content distribution system | Yuusaku Ohta, Natsume Matsuzaki, Hiroki Yamauchi | 2008-03-25 |
| 7296147 | Authentication system and key registration apparatus | Natsume Matsuzaki, Makoto Tatebayashi, Kaoru Yokota, Motoji Ohmori, Hirohito Kitatora | 2007-11-13 |
| 7233662 | Numerical array output device, a numerical array output method, an encryption device, and a decryption device | Motoji Ohmori, Kaoru Yokota, Makoto Tatebayashi | 2007-06-19 |
| 7209555 | Elliptic curve converting device, elliptic curve converting method, elliptic curve utilization device and elliptic curve generating device | Motoji Ohmori | 2007-04-24 |
| 7155610 | Cryptocommunication system, transmission apparatus, and reception apparatus | Masato Yamamichi, Motoji Ohmori, Makoto Tatebayashi | 2006-12-26 |
| 7130422 | Information security device, prime number generation device, and prime number generation method | Takatoshi Ono, Motoji Ohmori | 2006-10-31 |
| 7092522 | Apparatus for solving system of equations on finite field and apparatus for inverting element of extension field | — | 2006-08-15 |
| 7023362 | Positional information storage system and method, semiconductor memory, and program | Motoji Ohmori, Makoto Tatebayashi | 2006-04-04 |
| 6910058 | Method and device for constructing elliptical curves | Atsuko Miyaji | 2005-06-21 |
| 6611597 | Method and device for constructing elliptic curves | Atsuko Miyaji | 2003-08-26 |