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Hiroyuki Kurumatani
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Yokohama, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Method and apparatus for symmetric-key decryption
Patent number
7,359,515
Issue date
Apr 15, 2008
Hitachi, Ltd.
Soichi Furuya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for symmetric-key decryption
Patent number
7,200,232
Issue date
Apr 3, 2007
Hitachi, Ltd.
Soichi Furuya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for symmetric-key encryption
Patent number
7,110,545
Issue date
Sep 19, 2006
Tokyo, Japan
Soichi Furuya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for elliptic curve cryptography and recording...
Patent number
6,876,745
Issue date
Apr 5, 2005
Hitachi, Ltd.
Hiroyuki Kurumatani
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Elliptic curve encryption method and system
Patent number
6,480,606
Issue date
Nov 12, 2002
Hitachi, Ltd.
Hiroyuki Kurumatani
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Hash value generating method and device, data encryption method and...
Patent number
6,370,247
Issue date
Apr 9, 2002
Hitachi, Ltd.
Kazuo Takaragi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital signature generating/verifying method and system using publ...
Patent number
6,341,349
Issue date
Jan 22, 2002
Hitachi, Ltd.
Kazuo Takaragi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Key recovery method and system
Patent number
6,236,729
Issue date
May 22, 2001
Hitachi, Ltd.
Kazuo Takaragi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for generating hash value
Patent number
6,141,421
Issue date
Oct 31, 2000
Hitachi, Ltd.
Kazuo Takaragi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Hash value generating method and device, data encryption method and...
Patent number
6,122,375
Issue date
Sep 19, 2000
Hitachi, Ltd.
Kazuo Takaragi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
Method and apparatus for symmetric-key decryption
Publication number
20070064944
Publication date
Mar 22, 2007
Soichi Furuya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Method and apparatus for symmetric-key encryption
Publication number
20010021253
Publication date
Sep 13, 2001
Soichi Furuya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Method and apparatus for symmetric-key encryption
Publication number
20010021254
Publication date
Sep 13, 2001
Soichi Furuya
H04 - ELECTRIC COMMUNICATION TECHNIQUE