| 9419804 |
Data authenticity assurance method, management computer, and storage medium |
Natsuki Watanabe, Yoko Hashimoto, Kosuke Anzai, Naoki Hayashi, Yoshiaki Isobe +2 more |
2016-08-16 |
| 8108906 |
Electronic data authenticity assurance method and program |
Yasuo Hatano |
2012-01-31 |
| 8094824 |
Encrypting device, decrypting device, information system, encrypting method, decrypting method, and program |
Yasuo Hatano, Kenji Matsumoto, Yoji Shimizu |
2012-01-10 |
| 7941667 |
Electronic document authenticity guarantee method, and electronic document disclosure system |
Yasuo Hatano |
2011-05-10 |
| 7840487 |
Digital content encryption and decryption method and workflow system using digital content |
Yasuo Hatano, Kenji Matsumoto, Yoji Shimizu |
2010-11-23 |
| 7770009 |
Digital signing method |
Ryoichi Sasaki, Kazuo Takaragi, Seiichi Susaki, Toshiyuki Moritsu, Mizuhiro Sakai +2 more |
2010-08-03 |
| 7694126 |
Method and system for recovering the validity of cryptographically signed digital data |
Hiroshi Yoshiura, Seiichi Susaki, Ryoichi Sasaki, Kazuo Takaragi, Hisashi Toyoshima +1 more |
2010-04-06 |
| 7574605 |
Method of managing digital signature, apparatus for processing digital signature, and a computer readable medium for recording program of managing digital signature |
Kouichi Tanimoto, Shinji Itoh, Narihiro Omoto, Katsuko Nishioka |
2009-08-11 |
| 7526645 |
Electronic document authenticity assurance method and electronic document disclosure system |
Mitsuru Iwamura, Tsutomu Matsumoto, Ryoichi Sasaki, Hiroshi Yoshiura, Hirokazu Aoshima +3 more |
2009-04-28 |
| 7478432 |
Method and system for contents control |
Isao Echizen, Hiroshi Yoshiura, Kousuke Anzai, Jun'ichi Taguchi, Kazunori Nakano +1 more |
2009-01-13 |
| 7441115 |
Method for verifying a digital signature |
Narihiro Omoto, Shinji Itoh, Kouichi Tanimoto, Hiroshi Yoshiura |
2008-10-21 |
| 7401225 |
Method and apparatus for publishing signature log entry |
Kouichi Tanimoto, Shinji Itoh, Yasuaki Kudo, Yoshiharu Bessho |
2008-07-15 |
| 7359515 |
Method and apparatus for symmetric-key decryption |
Soichi Furuya, Kazuo Takaragi, Hiroyuki Kurumatani, Masashi Takahashi, Hisayoshi Sato +1 more |
2008-04-15 |
| 7305558 |
Digital signing method |
Ryoichi Sasaki, Kazuo Takaragi, Seiichi Susaki, Toshiyuki Moritsu, Mizuhiro Sakai +2 more |
2007-12-04 |
| 7210043 |
Trusted computer system |
Shinji Itoh, Hiroshi Yoshiura, Kazuo Takaragi, Masato Arai, Toshiaki Arai +2 more |
2007-04-24 |
| 7206939 |
File storage system and a NAS server |
Shinji Itoh, Narihiro Omoto, Yoshiharu Bessho |
2007-04-17 |
| 7200232 |
Method and apparatus for symmetric-key decryption |
Soichi Furuya, Kazuo Takaragi, Hiroyuki Kurumatani, Masashi Takahashi, Hisayoshi Sato +1 more |
2007-04-03 |
| 7200682 |
Time stamp generating system |
Seiichi Susaki, Kazuo Takaragi, Hiroshi Yoshiura, Takeshi Matsuki, Hisashi Toyoshima +3 more |
2007-04-03 |
| 7134021 |
Method and system for recovering the validity of cryptographically signed digital data |
Hiroshi Yoshiura, Seiichi Susaki, Ryoichi Sasaki, Kazuo Takaragi, Hisashi Toyoshima +1 more |
2006-11-07 |
| 7110545 |
Method and apparatus for symmetric-key encryption |
Soichi Furuya, Kazuo Takaragi, Hiroyuki Kurumatani, Masashi Takahashi, Hisayoshi Sato +1 more |
2006-09-19 |
| 7099002 |
Defect detector and method of detecting defect |
Tomoaki Ishiura, Katsumi Ichifuji |
2006-08-29 |
| 7047407 |
Network system enabling transmission control |
Shinji Itoh, Isao Echizen |
2006-05-16 |
| 6873706 |
Processing apparatus, program, or system of secret information |
Kazuo Takaragi, Yasuko Fukuzawa |
2005-03-29 |
| 6816969 |
Digital signature generating method and digital signature verifying method |
Ryoichi Sasaki, Kazuo Takaragi, Seiichi Susaki, Hisanori Mishima, Takeshi Matsuki +3 more |
2004-11-09 |
