Kazuo Ohta

Person

Chofu-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Generating device, encryption device, decryption device, generating...
- Patent number 10,027,479
- Issue date Jul 17, 2018
- Kabushiki Kaisha Toshiba
- Tsukasa Endo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Concealing apparatus, decoding apparatus, concealing method, and de...
- Patent number 9,984,239
- Issue date May 29, 2018
- Kabushiki Kaisha Toshiba
- Tsukasa Omino
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Encryption key generating apparatus and computer program product
- Patent number 9,537,653
- Issue date Jan 3, 2017
- Kabushiki Kaisha Toshiba
- Yuichi Komano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multisignature method, apparatus, program, and system
- Patent number 7,496,759
- Issue date Feb 24, 2009
- Kabushiki Kaisha Toshiba
- Yuichi Komano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for evaluating the strength of an encryption
- Patent number 7,187,769
- Issue date Mar 6, 2007
- Nippon Telegraph and Telephone Public Corporation
- Shiho Moriai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Data converter and recording medium on which program for executing...
- Patent number 6,769,063
- Issue date Jul 27, 2004
- Nippon Telegraph and Telephone Corporation
- Masayuki Kanda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Scheme for arithmetic operations in finite field and group operatio...
- Patent number 6,266,688
- Issue date Jul 24, 2001
- Nippon Telegraph and Telephone Corporation
- Kazmaro Aoki
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method and apparatus for en-bloc verification of plural digital sig...
- Patent number 6,212,637
- Issue date Apr 3, 2001
- Nippon Telegraph and Telephone Corporation
- Kazuo Ohta
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Scheme for arithmetic operations in finite field and group operatio...
- Patent number 6,202,076
- Issue date Mar 13, 2001
- Nippon Telegraph and Telephone Corporation
- Kazmaro Aoki
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Scheme for arithmetic operations in finite field and group operatio...
- Patent number 6,038,581
- Issue date Mar 14, 2000
- Nippon Telegraph & Telephone Corporation
- Kazumaro Aoki
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Electronic cash implementing method using a trustee
- Patent number 5,901,229
- Issue date May 4, 1999
- Nippon Telegraph and Telephone Corp.
- Eiichiro Fujisaki
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method and apparatus for implementing traceable electronic cash
- Patent number 5,889,862
- Issue date Mar 30, 1999
- Nippon Telegraph & Telephone Corporation
- Kazuo Ohta
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Electronic cash system
- Patent number 5,224,162
- Issue date Jun 29, 1993
- Nippon Telegraph & Telephone Corporation
- Tatsuaki Okamoto
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method and apparatus for implementing electronic cash
- Patent number 4,977,595
- Issue date Dec 11, 1990
- Nippon Telegraph & Telephone Corporation
- Kazuo Ohta
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Authentication system and apparatus therefor
- Patent number 4,969,189
- Issue date Nov 6, 1990
- Nippon Telegraph & Telephone Corporation
- Kazuo Ohta
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
CONCEALING APPARATUS, DECODING APPARATUS, CONCEALING METHOD, AND DE...
- Publication number 20160314305
- Publication date Oct 27, 2016
- Kabushiki Kaisha Toshiba
- Tsukasa OMINO
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
GENERATING DEVICE, ENCRYPTION DEVICE, DECRYPTION DEVICE, GENERATING...
- Publication number 20140294176
- Publication date Oct 2, 2014
- KABUSHIKI KAISHA TOSHIBA
- Tsukasa ENDO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
ENCRYPTION KEY GENERATING APPARATUS AND COMPUTER PROGRAM PRODUCT
- Publication number 20130156183
- Publication date Jun 20, 2013
- Yuichi KOMANO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Multisignature method, apparatus, program, and system
- Publication number 20050201561
- Publication date Sep 15, 2005
- Yuichi Komano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Person

Patents Grantslast 30 patents

Generating device, encryption device, decryption device, generating...

Concealing apparatus, decoding apparatus, concealing method, and de...

Encryption key generating apparatus and computer program product

Multisignature method, apparatus, program, and system

Method and apparatus for evaluating the strength of an encryption

Data converter and recording medium on which program for executing...

Scheme for arithmetic operations in finite field and group operatio...

Method and apparatus for en-bloc verification of plural digital sig...

Scheme for arithmetic operations in finite field and group operatio...

Scheme for arithmetic operations in finite field and group operatio...

Electronic cash implementing method using a trustee

Method and apparatus for implementing traceable electronic cash

Electronic cash system

Method and apparatus for implementing electronic cash

Authentication system and apparatus therefor

Patents Applicationslast 30 patents

CONCEALING APPARATUS, DECODING APPARATUS, CONCEALING METHOD, AND DE...

GENERATING DEVICE, ENCRYPTION DEVICE, DECRYPTION DEVICE, GENERATING...

ENCRYPTION KEY GENERATING APPARATUS AND COMPUTER PROGRAM PRODUCT

Multisignature method, apparatus, program, and system