| Patent | Date |
|---|
Signature Device, Verification Device, Signature Method, Verification Method, And Computer Readable Medium
App 20210359848 - TAKASHIMA; Katsuyuki ; et al. | 2021-11-18 |
Decryption Device, Cryptographic System, And Decryption Method
App 20210234676 - TAKASHIMA; Katsuyuki ; et al. | 2021-07-29 |
Cryptographic system
Grant 9,722,783 - Takashima , et al. August 1, 2 | 2017-08-01 |
Cryptographic system, cryptographic method, cryptographic program, and decryption device
Grant 9,413,531 - Takashima , et al. August 9, 2 | 2016-08-09 |
Cryptographic system, cryptographic method, and cryptographic program
Grant 9,407,438 - Takashima , et al. August 2, 2 | 2016-08-02 |
Cryptographic processing system, key generation device, encryption device, decryption device, key delegation device, cryptographic processing method, and cryptographic processing program
Grant 9,385,867 - Takashima , et al. July 5, 2 | 2016-07-05 |
Cryptographic processing system, cryptographic processing method, cryptograhpic processing program, and key generation device
Grant 9,203,622 - Takashima , et al. December 1, 2 | 2015-12-01 |
Cryptographic processing system, key generation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program utilizing attribute information for generation of a key for decryption or encryption
Grant 9,183,411 - Takashima , et al. November 10, 2 | 2015-11-10 |
Cryptographic System
App 20150229472 - Takashima; Katsuyuki ; et al. | 2015-08-13 |
Signature processing system, key generation device, signature device, verification device, signature processing method, and signature processing program
Grant 9,106,408 - Takashima , et al. August 11, 2 | 2015-08-11 |
Cryptographic System, Cryptographic Method, Cryptographic Program, And Decryption Device
App 20150098566 - Takashima; Katsuyuki ; et al. | 2015-04-09 |
Cryptographic processing system, key generation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program
Grant 8,938,623 - Takashima , et al. January 20, 2 | 2015-01-20 |
Cryptographic System, Cryptographic Method, And Cryptographic Program
App 20150010147 - Takashima; Katsuyuki ; et al. | 2015-01-08 |
Cryptographic processing system, key generation device, key delegation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program
Grant 8,929,542 - Takashima , et al. January 6, 2 | 2015-01-06 |
Cryptographic processing system, key generation device, encryption device, decryption device, signature processing system, signature device, and verification device
Grant 8,913,742 - Takashima , et al. December 16, 2 | 2014-12-16 |
Cryptographic Processing System, Cryptographic Processing Method, Cryptograhpic Processing Program, And Key Generation Device
App 20140298028 - Takashima; Katsuyuki ; et al. | 2014-10-02 |
Cryptographic Processing System, Key Generation Device, Encryption Device, Decryption Device, Key Delegation Device, Cryptographic Processing Method, And Cryptographic Processing Program
App 20130336474 - Takashima; Katsuyuki ; et al. | 2013-12-19 |
Cryptographic Processing System, Key Generation Device, Encryption Device, Decryption Device, Cryptographic Processing Method, And Cryptographic Processing Program
App 20130339754 - Takashima; Katsuyuki ; et al. | 2013-12-19 |
Signature Processing System, Key Generation Device, Signature Device, Verification Device, Signature Processing Method, And Signature Processing Program
App 20130322627 - Takashima; Katsuyuki ; et al. | 2013-12-05 |
Cryptographic processing system, key generation device, key delegation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program
Grant 8,577,030 - Takashima , et al. November 5, 2 | 2013-11-05 |
Cryptographic processing system
Grant 8,559,638 - Takashima , et al. October 15, 2 | 2013-10-15 |
Cryptographic Processing System, Key Generation Device, Encryption Device, Decryption Device, Cryptographic Processing Method, And Cryptographic Processing Program
App 20130173929 - Takashima; Katsuyuki ; et al. | 2013-07-04 |
Signature generating apparatus, signature verifying apparatus, and methods and programs therefor
Grant 8,458,478 - Suzuki , et al. June 4, 2 | 2013-06-04 |
Cryptographic Processing System, Key Generation Device, Key Delegation Device, Encryption Device, Decryption Device, Cryptographic Processing Method, And Cryptographic Processing Program
App 20130039489 - Takashima; Katsuyuki ; et al. | 2013-02-14 |
Cryptographic Processing System, Key Generation Device, Encryption Device, Decryption Device, Signature Processing System, Signature Device, And Verification Device
App 20130028415 - Takashima; Katsuyuki ; et al. | 2013-01-31 |
Cryptographic Processing System, Key Generation Device, Key Delegation Device, Encryption Device, Decryption Device, Cryptographic Processing Method, And Cryptographic Processing Program
App 20120284530 - Takashima; Katsuyuki ; et al. | 2012-11-08 |
Cryptographic Processing System
App 20120045056 - Takashima; Katsuyuki ; et al. | 2012-02-23 |
Signature Generating Apparatus, Signature Verifying Apparatus, And Methods And Programs Therefor
App 20100268957 - Suzuki; Koutarou ; et al. | 2010-10-21 |
Electronic cash implementing method and equipment using user signature and recording medium recorded thereon a program for the method
Grant 7,222,108 - Moribatake , et al. May 22, 2 | 2007-05-22 |
Electronic cash implementing method and equipment using user signature and recording medium recorded thereon a program for the method
App 20040083182 - Moribatake, Hidemi ; et al. | 2004-04-29 |
Electronic cash implementing method and equipment using user signature and recording medium recorded thereon a program for the method
Grant 6,539,364 - Moribatake , et al. March 25, 2 | 2003-03-25 |
Encryption and decryption devices for public-key cryptosystems and recording medium with their processing programs recorded thereon
Grant 6,480,605 - Uchiyama , et al. November 12, 2 | 2002-11-12 |
Electronic Cash Implementing Method And Equipment Using User Signature And Recording Medium Recorded Thereon A Program For The Method
App 20010049667 - MORIBATAKE, HIDEMI ; et al. | 2001-12-06 |
Method and system for depositing private key used in RSA cryptosystem
Grant 6,072,876 - Obata , et al. June 6, 2 | 2000-06-06 |
Electronic cash implementing method with a surveillance institution, and user apparatus and surveillance institution apparatus for implementing the same
Grant 6,003,765 - Okamoto December 21, 1 | 1999-12-21 |
Method and apparatus for implementing hierarchical electronic cash
Grant 5,926,548 - Okamoto July 20, 1 | 1999-07-20 |
Electronic cash implementing method using a trustee
Grant 5,901,229 - Fujisaki , et al. May 4, 1 | 1999-05-04 |
Method and apparatus for settlement of accounts by IC cards
Grant 5,502,765 - Ishiguro , et al. March 26, 1 | 1996-03-26 |
Method and apparatus for settlement of accounts by IC cards
Grant 5,446,796 - Ishiguro , et al. August 29, 1 | 1995-08-29 |
Method and apparatus for settlement of accounts by IC cards
Grant 5,396,558 - Ishiguro , et al. March 7, 1 | 1995-03-07 |
Electronic cash system
Grant 5,224,162 - Okamoto , et al. June 29, 1 | 1993-06-29 |
Method and apparatus for implementing electronic cash
Grant 4,977,595 - Ohta , et al. December 11, 1 | 1990-12-11 |
Authentication system and apparatus therefor
Grant 4,969,189 - Ohta , et al. November 6, 1 | 1990-11-06 |
Signed document transmission system
Grant 4,625,076 - Okamoto , et al. November 25, 1 | 1986-11-25 |
| 