| Patent | Date |
|---|
Signature Device, Verification Device, Signature Method, Verification Method, And Computer Readable Medium
App 20210359848 - TAKASHIMA; Katsuyuki ; et al. | 2021-11-18 |
Key sharing device, key sharing method, and computer readable medium
Grant 11,171,778 - Takashima , et al. November 9, 2 | 2021-11-09 |
Decryption Device, Cryptographic System, And Decryption Method
App 20210234676 - TAKASHIMA; Katsuyuki ; et al. | 2021-07-29 |
Key Sharing Device, Key Sharing Method, And Computer Readable Medium
App 20210083854 - TAKASHIMA; Katsuyuki ; et al. | 2021-03-18 |
Decryption Device, Encryption Device, And Cryptographic System
App 20210036852 - TAKASHIMA; Katsuyuki ; et al. | 2021-02-04 |
Encryption Device, Decryption Device, Encryption Method, Decryption Method, And Computer Readable Medium
App 20200175893 - TAKASHIMA; Katsuyuki | 2020-06-04 |
Cryptographic system and key generation apparatus
Grant 10,516,534 - Takashima Dec | 2019-12-24 |
Cryptographic System And Key Generation Apparatus
App 20180357933 - TAKASHIMA; Katsuyuki | 2018-12-13 |
Cryptographic system, encryption device, re-encryption key generation device, re-encryption device, and cryptographic program
Grant 9,979,536 - Kawai , et al. May 22, 2 | 2018-05-22 |
Cryptographic system, cryptographic method, and computer readable medium
Grant 9,755,823 - Takashima , et al. September 5, 2 | 2017-09-05 |
Cryptographic system
Grant 9,722,783 - Takashima , et al. August 1, 2 | 2017-08-01 |
Cryptographic system and computer readable medium
Grant 9,640,090 - Takashima May 2, 2 | 2017-05-02 |
Cryptographic System And Computer Readable Medium
App 20170053566 - TAKASHIMA; Katsuyuki | 2017-02-23 |
Cryptographic System, Re-encryption Key Generation Device, Re-encryption Device, And Cryptographic Computer Readable Medium
App 20160344708 - KAWAI; Yutaka ; et al. | 2016-11-24 |
Cryptographic System, Key Generation Apparatus, Re-encryption Apparatus And User Terminal
App 20160330022 - ITO; Takashi ; et al. | 2016-11-10 |
Cryptographic System, Encryption Device, Re-encryption Key Generation Device, Re-encryption Device, And Cryptographic Program
App 20160234012 - KAWAI; Yutaka ; et al. | 2016-08-11 |
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 system, re-encryption key generation device, re-encryption device, cryptographic method, and cryptographic program
Grant 9,344,276 - Kawai , et al. May 17, 2 | 2016-05-17 |
Cryptographic System, Cryptographic Method, And Cryptographic Program
App 20160072625 - TAKASHIMA; Katsuyuki ; et al. | 2016-03-10 |
Encrypted data management device, encrypted data management method, and encrypted data management program
Grant 9,237,013 - Ichikawa , et al. January 12, 2 | 2016-01-12 |
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, Re-encryption Key Generation Device, Re-encryption Device, Cryptographic Method, And Cryptographic Program
App 20150318988 - KAWAI; Yutaka ; et al. | 2015-11-05 |
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 |
Data processing device
Grant 8,958,552 - Hattori , et al. February 17, 2 | 2015-02-17 |
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 |
Encrypted Data Management Device, Encrypted Data Management Method, And Encrypted Data Management Program
App 20140310521 - Ichikawa; Sachihiro ; et al. | 2014-10-16 |
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 |
Verification apparatus
Grant 8,458,479 - Takashima June 4, 2 | 2013-06-04 |
Encryption parameter setting apparatus, key generation apparatus, cryptographic system, program, encryption parameter setting method, and key generation method
Grant 8,401,179 - Takashima March 19, 2 | 2013-03-19 |
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 |
Secure Search System, Public Parameter Generation Device, Encryption Device, User Secret Key Generation Device, Query Issuing Device, Search Device, Computer Program, Secure Search Method, Public Parameter Generation Method, Encryption Method, User Secret Key Generation Method, Query Issuing Method,
App 20120324240 - Hattori; Mitsuhiro ; et al. | 2012-12-20 |
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 |
Ciphertext generating apparatus, cryptographic communication system, and group parameter generating apparatus
Grant 8,290,146 - Takashima October 16, 2 | 2012-10-16 |
Data Processing Device
App 20120207299 - Hattori; Mitsuhiro ; et al. | 2012-08-16 |
Cryptographic Processing System
App 20120045056 - Takashima; Katsuyuki ; et al. | 2012-02-23 |
Apparatus for generating elliptic curve cryptographic parameter, apparatus for processing elliptic curve cryptograph, program for generating elliptic curve cryptographic parameter, and program for processing elliptic cyptograph
Grant 8,111,826 - Takashima February 7, 2 | 2012-02-07 |
Encryption Parameter Setting Apparatus, Key Generation Apparatus, Cryptographic System, Program, Encryption Parameter Setting Method, And Key Generation Method
App 20100329454 - Takashima; Katsuyuki | 2010-12-30 |
Verification Apparatus
App 20100275028 - Takashima; Katsuyuki | 2010-10-28 |
Ciphertext Generating Apparatus, Cryptographic Communication System, And Group Parameter Generating Apparatus
App 20100104094 - Takashima; Katsuyuki | 2010-04-29 |
Apparatus for Generating Elliptic Curve Cryptographic Parameter, Apparatus for Processing Elliptic Curve Cryptograph, Program for Generating Elliptic Curve Cryptographic Parameter, and Program for Processing Elliptic Cryptograph
App 20090285386 - Takashima; Katsuyuki | 2009-11-19 |
Elliptic curve encryption processor, processing method of the processor using elliptic curves, and program for causing a computer to execute point scalar multiplication on elliptic curves
App 20070053506 - Takashima; Katsuyuki | 2007-03-08 |
| 