Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12120231 | Digital watermark system, digital watermark method and program | — | 2024-10-15 |
| 11658806 | Identity-based hash proof system configuration apparatus, identity-based encryption apparatus, identity-based hash proof system configuration method and program | Takashi Yamakawa | 2023-05-23 |
| 11450238 | Conversion key generation apparatus, encrypted text conversion apparatus, decryption apparatus, encrypted text conversion system, conversion key generation method, encrypted text conversion method, decryption method, and program | — | 2022-09-20 |
| 11336441 | Communication terminal, server apparatus, and program | Yuki OKANO, Reo Yoshida, Tetsutaro Kobayashi | 2022-05-17 |
| 11223472 | Encrypted message search method, message transmission/reception system, server, terminal and program | Yuki OKANO, Reo Yoshida, Tetsutaro Kobayashi | 2022-01-11 |
| 11190499 | Communication terminals, server devices, and programs | Yuki OKANO, Reo Yoshida, Tetsutaro Kobayashi | 2021-11-30 |
| 8964988 | Secret sharing system, sharing apparatus, share management apparatus, acquisition apparatus, secret sharing method, program and recording medium | Koutarou Suzuki | 2015-02-24 |
| 8619980 | Information generation apparatus, method, program, and recording medium for deriving a decryption key from another decryption key | Koutarou Suzuki | 2013-12-31 |
| 8549290 | Secret sharing system, sharing apparatus, share management apparatus, acquisition apparatus, processing methods thereof, secret sharing method, program, and recording medium | Koutarou Suzuki | 2013-10-01 |