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Kawasaki, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Communication system, communication method, and communication device
Patent number
10,270,768
Issue date
Apr 23, 2019
Fujitsu Limited
Jun Yajima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Electronic circuit, latch circuit, and external action detecting ci...
Patent number
9,793,895
Issue date
Oct 17, 2017
Fujitsu Limited
Dai Yamamoto
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Multiple-word multiplication-accumulation circuit and montgomery mo...
Patent number
8,078,661
Issue date
Dec 13, 2011
Fujitsu Semiconductor Limited
Kenji Mukaida
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Device and method for calculating conversion parameter of montgomer...
Patent number
7,792,893
Issue date
Sep 7, 2010
Fujitsu Limited
Kouichi Itoh
G06 - COMPUTING CALCULATING COUNTING
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
Encryption/decryption system for calculating effective lower bits o...
Patent number
7,403,965
Issue date
Jul 22, 2008
Fujitsu Limited
Kenji Mukaida
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Encryption secured against DPA
Patent number
7,386,130
Issue date
Jun 10, 2008
Fujitsu Limited
Koichi Ito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Encryption circuit
Patent number
7,158,638
Issue date
Jan 2, 2007
Fujitsu Limited
Souichi Okada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Encryption operating apparatus and method having side-channel attac...
Patent number
7,065,788
Issue date
Jun 20, 2006
Fujitsu Limited
Jun Yajima
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Extended key preparing apparatus, extended key preparing method, re...
Patent number
6,956,951
Issue date
Oct 18, 2005
Fujitsu Limited
Takeshi Shimoyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Data protection system, data preparation device, and data working d...
Patent number
6,829,592
Issue date
Dec 7, 2004
Fujitsu Limited
Takayuki Hasebe
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Remainder calculating method, modular-multiplication method, remain...
Patent number
6,415,310
Issue date
Jul 2, 2002
Fujitsu Limited
Masahiko Takenaka
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Software license protection via cryptography
Patent number
6,385,726
Issue date
May 7, 2002
Fujitsu Limited
Takayuki Hasebe
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Prime number generation apparatus B-smoothness judgement apparatus...
Patent number
6,330,332
Issue date
Dec 11, 2001
Fujitsu Limited
Koichi Itoh
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Key recovery condition encryption and decryption apparatuses
Patent number
6,272,225
Issue date
Aug 7, 2001
NEC Corporation
Hiroshi Miyauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Key recovery system and key recovery method
Patent number
6,266,421
Issue date
Jul 24, 2001
Hitachi, Ltd.
Seiichi Domyo
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Key recovery system
Patent number
6,185,308
Issue date
Feb 6, 2001
Fujitsu Limited
Hiroyuki Ando
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Storage medium driving device, storage medium and data protecting m...
Patent number
6,173,390
Issue date
Jan 9, 2001
Fujitsu Limited
Seigo Kotani
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Encrypted data recovery method using split storage key and system t...
Patent number
6,118,874
Issue date
Sep 12, 2000
Hitachi, Ltd.
Eiji Okamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
System for management of software employing memory for processing u...
Patent number
6,067,640
Issue date
May 23, 2000
Fujitsu Limited
Ryota Akiyama
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Data processing apparatus
Patent number
5,953,416
Issue date
Sep 14, 1999
Fujitsu Limited
Takayuki Hasebe
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Licensee notification system
Patent number
5,935,243
Issue date
Aug 10, 1999
Fujitsu Ltd.
Takayuki Hasebe
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
File protection system, software utilization system using the file...
Patent number
5,917,908
Issue date
Jun 29, 1999
Fujitsu Limited
Masahiko Takenaka
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Encoder and decoder
Patent number
5,838,791
Issue date
Nov 17, 1998
Fujitsu Limited
Naoya Torii
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Method and device for utilizing data content
Patent number
5,832,083
Issue date
Nov 3, 1998
Fujitsu Limited
Noboru Iwayama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
System for management of software employing memory for processing u...
Patent number
5,822,771
Issue date
Oct 13, 1998
Fujitsu Limited
Ryota Akiyama
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
System for refunding payment for software
Patent number
5,761,308
Issue date
Jun 2, 1998
Fujitsu Limited
Naoya Torii
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Software charging system and software data utilization permitting d...
Patent number
5,761,651
Issue date
Jun 2, 1998
Fujitsu Limited
Takayuki Hasebe
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Transformation pattern generating device and encryption function de...
Patent number
5,623,548
Issue date
Apr 22, 1997
Fujitsu Limited
Ryota Akiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
APPARATUS AND METHOD FOR CONTROLLING PROFILE DATA DELIVERY
Publication number
20170366525
Publication date
Dec 21, 2017
Fujitsu Limited
Junji TAKAGI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND COMMUNICATION DEVICE
Publication number
20170208065
Publication date
Jul 20, 2017
Fujitsu Limited
Jun Yajima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ELECTRONIC CIRCUIT, LATCH CIRCUIT, AND EXTERNAL ACTION DETECTING CI...
Publication number
20170187381
Publication date
Jun 29, 2017
Fujitsu Limited
Dai YAMAMOTO
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
INFORMATION COLLECTION APPARATUS AND METHOD
Publication number
20160246994
Publication date
Aug 25, 2016
Fujitsu Limited
Takao OGURA
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
Device and method for calculating conversion parameter of montgomer...
Publication number
20060235921
Publication date
Oct 19, 2006
FUJITSU LIMITED
Kouichi Itoh
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
Multiple-word multiplication-accumulation circuit and Montgomery mo...
Publication number
20050165876
Publication date
Jul 28, 2005
FUJITSU LIMITED
Kenji Mukaida
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Arithmetic device
Publication number
20050165875
Publication date
Jul 28, 2005
FUJITSU LIMITED
Kenji Mukaida
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
Encryption operating apparatus and method having side-channel attac...
Publication number
20030133567
Publication date
Jul 17, 2003
FUJITSU LIMITED
Jun Yajima
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Encryption circuit
Publication number
20030108195
Publication date
Jun 12, 2003
FUJITSU LIMITED
Souichi Okada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Encryption secured against DPA
Publication number
20030048903
Publication date
Mar 13, 2003
FUJITSU LIMITED
Koichi Ito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Computing apparatus using an SPN structure in an F function and a c...
Publication number
20020021801
Publication date
Feb 21, 2002
Takeshi Shimoyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Extended key preparing apparatus, extended key preparing method, re...
Publication number
20020006196
Publication date
Jan 17, 2002
Takeshi Shimoyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE