Tetsuya Izu

Person

Kawasaki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Verification method, information processing device, and non-transit...
- Patent number 11,451,403
- Issue date Sep 20, 2022
- Fujitsu Limited
- Rikuhiro Kojima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication method, node, and network system
- Patent number 9,203,800
- Issue date Dec 1, 2015
- Fujitsu Limited
- Tetsuya Izu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Information processing apparatus, tampering detection apparatus, in...
- Patent number 9,071,420
- Issue date Jun 30, 2015
- Fujitsu Limited
- Jun Yajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key setting method, node, server, and network system
- Patent number 9,032,203
- Issue date May 12, 2015
- Fujitsu Limited
- Masahiko Takenaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key setting method, node, and network system
- Patent number 8,732,454
- Issue date May 20, 2014
- Fujitsu Limited
- Kazuyoshi Furukawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key setting method, node, and network system
- Patent number 8,719,563
- Issue date May 6, 2014
- Fujitsu Limited
- Hisashi Kojima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Document verifying apparatus, document verifying method, and comput...
- Patent number 8,719,578
- Issue date May 6, 2014
- Fujitsu Limited
- Tetsuya Izu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Data processing apparatus and digital signature method
- Patent number 8,533,483
- Issue date Sep 10, 2013
- Fujitsu Limited
- Tetsuya Izu
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Digital signature method, program, and apparatus
- Patent number 8,452,973
- Issue date May 28, 2013
- Fujitsu Limited
- Tetsuya Izu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus, method, and program for digital signature
- Patent number 8,433,913
- Issue date Apr 30, 2013
- Fujitsu Limited
- Masahiko Takenaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electronic signature method, apparatus, and recording medium having...
- Patent number 8,433,910
- Issue date Apr 30, 2013
- Fujitsu Limited
- Masahiko Takenaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic device having tamper resistance to power analysis attack
- Patent number 8,391,477
- Issue date Mar 5, 2013
- Fujitsu Limited
- Tetsuya Izu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Recording medium, digital information verification apparatus, and d...
- Patent number 8,335,922
- Issue date Dec 18, 2012
- Fujitsu Limited
- Takashi Yoshioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Methods and apparatus for verifying electronic mail
- Patent number 8,312,266
- Issue date Nov 13, 2012
- Fujitsu Limited
- Takashi Yoshioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for digital signature authentication, and comp...
- Patent number 8,037,312
- Issue date Oct 11, 2011
- Fujitsu Limited
- Masahiko Takenaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Elliptic curve cryptosystem apparatus, storage medium storing ellip...
- Patent number 7,970,131
- Issue date Jun 28, 2011
- Fujitsu Limited
- Tetsuya Izu
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Digital document management system, digital document management met...
- Patent number 7,900,050
- Issue date Mar 1, 2011
- Fujitsu Limited
- Tetsuya Izu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Elliptic curve cryptosystem apparatus, elliptic curve cryptosystem...
- Patent number 7,639,808
- Issue date Dec 29, 2009
- Fujitsu Limited
- Tetsuya Izu
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Tamper-proof elliptic encryption with private key
- Patent number 7,536,011
- Issue date May 19, 2009
- Fujitsu Limited
- Masahiko Takenaka
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Elliptic curve cryptosystem apparatus, storage medium storing ellip...
- Patent number 7,505,587
- Issue date Mar 17, 2009
- Fujitsu Limited
- Tetsuya Izu
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
COMPUTER-READABLE RECORDING MEDIUM STORING INFORMATION PROCESSING P...
- Publication number 20220222042
- Publication date Jul 14, 2022
- Fujitsu Limited
- Jumpei YAMAGUCHI
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
VERIFICATION METHOD, INFORMATION PROCESSING DEVICE, AND NON-TRANSIT...
- Publication number 20210226801
- Publication date Jul 22, 2021
- Fujitsu Limited
- Rikuhiro Kojima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
INFORMATION PROCESSING APPARATUS, TAMPERING DETECTION APPARATUS, IN...
- Publication number 20140169555
- Publication date Jun 19, 2014
- Fujitsu Limited
- Jun Yajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION METHOD, NODE, AND NETWORK SYSTEM
- Publication number 20130312082
- Publication date Nov 21, 2013
- Fujitsu Limited
- Tetsuya IZU
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
KEY SETTING METHOD, NODE, SERVER, AND NETWORK SYSTEM
- Publication number 20130290701
- Publication date Oct 31, 2013
- Fujitsu Limited
- Masahiko TAKENAKA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
KEY SETTING METHOD, NODE, AND NETWORK SYSTEM
- Publication number 20130138949
- Publication date May 30, 2013
- FUJITSU LIMITED
- Kazuyoshi FURUKAWA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
KEY SETTING METHOD, NODE, AND NETWORK SYSTEM
- Publication number 20130138950
- Publication date May 30, 2013
- FUJITSU LIMITED
- Hisashi KOJIMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION DEVICE, RECORDING MEDIUM, AND METHOD THEREOF
- Publication number 20130070925
- Publication date Mar 21, 2013
- Fujitsu Limited
- Kenji Yamada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC PROCESSING APPARATUS AND METHOD
- Publication number 20110194693
- Publication date Aug 11, 2011
- Fujitsu Limited
- Tetsuya Izu
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
CONTENTS PROCESSING DEVICE AND CONTENTS PARTIAL INTEGRITY ASSURANCE...
- Publication number 20110078458
- Publication date Mar 31, 2011
- FUJITSU LIMITED
- Kazuyoshi FURUKAWA
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
DATA PROCESSING APPARATUS AND DIGITAL SIGNATURE METHOD
- Publication number 20110072278
- Publication date Mar 24, 2011
- Fujitsu Limited
- Tetsuya Izu
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
ELLIPTIC CURVE ARITHMETIC PROCESSING UNIT AND ELLIPTIC CURVE ARITHM...
- Publication number 20100232601
- Publication date Sep 16, 2010
- FUJITSU LIMITED
- Kouichi ITOH
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
DIGITAL SIGNATURE METHOD, PROGRAM, AND APPARATUS
- Publication number 20100185867
- Publication date Jul 22, 2010
- Fujitsu Limited
- Tetsuya Izu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
APPARATUS, METHOD, AND PROGRAM FOR DIGITAL SIGNATURE
- Publication number 20100169653
- Publication date Jul 1, 2010
- FUJITSU LIMITED
- Masahiko TAKENAKA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
STORAGE MEDIA STORING ELECTRONIC DOCUMENT MANAGEMENT PROGRAM, ELECT...
- Publication number 20100005306
- Publication date Jan 7, 2010
- Fujitsu Limited
- Tetsuya Izu
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Electronic document managing apparatus
- Publication number 20090290189
- Publication date Nov 26, 2009
- FUJITSU LIMITED
- Tetsuya Izu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DOCUMENT VERIFYING APPARATUS, DOCUMENT VERIFYING METHOD, AND COMPUT...
- Publication number 20090265558
- Publication date Oct 22, 2009
- FUJITSU LIMITED
- Tetsuya Izu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
ELLIPTIC CURVE CRYPTOSYSTEM APPARATUS, STORAGE MEDIUM STORING ELLIP...
- Publication number 20090207997
- Publication date Aug 20, 2009
- FUJITSU LIMITED
- Tetsuya Izu
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Document verification apparatus, document verification method, and...
- Publication number 20090210715
- Publication date Aug 20, 2009
- FUJITSU LIMITED
- Tetsuya Izu
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
ELECTRONIC SIGNATURE METHOD, APPARATUS, AND RECORDING MEDIUM HAVING...
- Publication number 20090193256
- Publication date Jul 30, 2009
- FUJITSU LIMITED
- Masahiko TAKENAKA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
METHODS AND APPARATUS FOR VERIFYING ELECTRONIC MAIL
- Publication number 20090013379
- Publication date Jan 8, 2009
- Fujitsu Limited
- Takashi Yoshioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method and apparatus for digital signature authentication, and comp...
- Publication number 20080256362
- Publication date Oct 16, 2008
- FUJITSU LIMITED
- Masahiko Takenaka
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Recording medium, digital information verification apparatus, and d...
- Publication number 20080082829
- Publication date Apr 3, 2008
- FUJITSU LIMITED
- Takashi Yoshioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC DEVICE HAVING TAMPER RESISTANCE TO POWER ANALYSIS ATTACK
- Publication number 20080025500
- Publication date Jan 31, 2008
- FUJITSU LIMITED
- Tetsuya Izu
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Tamper-proof elliptic encryption with private key
- Publication number 20070177721
- Publication date Aug 2, 2007
- FUJITSU LIMITED
- Kouichi Itoh
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Digital document management system, digital document management met...
- Publication number 20070168672
- Publication date Jul 19, 2007
- FUJITSU LIMITED
- Tetsuya Izu
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Digital document management system, digital document management met...
- Publication number 20070168671
- Publication date Jul 19, 2007
- FUJITSU LIMITED
- Masahiko Takenaka
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Elliptic curve cryptosystem apparatus, elliptic curve cryptosystem...
- Publication number 20060093137
- Publication date May 4, 2006
- FUJITSU LIMITED
- Tetsuya Izu
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Tamper-proof elliptic encryption with private key
- Publication number 20050152541
- Publication date Jul 14, 2005
- FUJITSU LIMITED
- Masahiko Takenaka
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Elliptic curve cryptosystem apparatus, storage medium storing ellip...
- Publication number 20030123656
- Publication date Jul 3, 2003
- FUJITSU LIMITED
- Tetsuya Izu
- G06 - COMPUTING CALCULATING COUNTING

Tetsuya Izu

Person

Patents Grantslast 30 patents

Verification method, information processing device, and non-transit...

Communication method, node, and network system

Information processing apparatus, tampering detection apparatus, in...

Key setting method, node, server, and network system

Key setting method, node, and network system

Key setting method, node, and network system

Document verifying apparatus, document verifying method, and comput...

Data processing apparatus and digital signature method

Digital signature method, program, and apparatus

Apparatus, method, and program for digital signature

Electronic signature method, apparatus, and recording medium having...

Cryptographic device having tamper resistance to power analysis attack

Recording medium, digital information verification apparatus, and d...

Methods and apparatus for verifying electronic mail

Method and apparatus for digital signature authentication, and comp...

Elliptic curve cryptosystem apparatus, storage medium storing ellip...

Digital document management system, digital document management met...

Elliptic curve cryptosystem apparatus, elliptic curve cryptosystem...

Tamper-proof elliptic encryption with private key

Elliptic curve cryptosystem apparatus, storage medium storing ellip...

Patents Applicationslast 30 patents

COMPUTER-READABLE RECORDING MEDIUM STORING INFORMATION PROCESSING P...

VERIFICATION METHOD, INFORMATION PROCESSING DEVICE, AND NON-TRANSIT...

INFORMATION PROCESSING APPARATUS, TAMPERING DETECTION APPARATUS, IN...

COMMUNICATION METHOD, NODE, AND NETWORK SYSTEM

KEY SETTING METHOD, NODE, SERVER, AND NETWORK SYSTEM

KEY SETTING METHOD, NODE, AND NETWORK SYSTEM

KEY SETTING METHOD, NODE, AND NETWORK SYSTEM

COMMUNICATION DEVICE, RECORDING MEDIUM, AND METHOD THEREOF

CRYPTOGRAPHIC PROCESSING APPARATUS AND METHOD

CONTENTS PROCESSING DEVICE AND CONTENTS PARTIAL INTEGRITY ASSURANCE...

DATA PROCESSING APPARATUS AND DIGITAL SIGNATURE METHOD

ELLIPTIC CURVE ARITHMETIC PROCESSING UNIT AND ELLIPTIC CURVE ARITHM...

DIGITAL SIGNATURE METHOD, PROGRAM, AND APPARATUS

APPARATUS, METHOD, AND PROGRAM FOR DIGITAL SIGNATURE

STORAGE MEDIA STORING ELECTRONIC DOCUMENT MANAGEMENT PROGRAM, ELECT...

Electronic document managing apparatus

DOCUMENT VERIFYING APPARATUS, DOCUMENT VERIFYING METHOD, AND COMPUT...

ELLIPTIC CURVE CRYPTOSYSTEM APPARATUS, STORAGE MEDIUM STORING ELLIP...

Document verification apparatus, document verification method, and...

ELECTRONIC SIGNATURE METHOD, APPARATUS, AND RECORDING MEDIUM HAVING...

METHODS AND APPARATUS FOR VERIFYING ELECTRONIC MAIL

Method and apparatus for digital signature authentication, and comp...

Recording medium, digital information verification apparatus, and d...

CRYPTOGRAPHIC DEVICE HAVING TAMPER RESISTANCE TO POWER ANALYSIS ATTACK

Tamper-proof elliptic encryption with private key

Digital document management system, digital document management met...

Digital document management system, digital document management met...

Elliptic curve cryptosystem apparatus, elliptic curve cryptosystem...

Tamper-proof elliptic encryption with private key

Elliptic curve cryptosystem apparatus, storage medium storing ellip...