Digital signature generating apparatus, method, computer...

Details Digital signature generating apparatus, method, computer... Digital signature generating apparatus, method, computer...

2004-03-10

2009-06-02

Moazzami, Nasser G (Department: 2436)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S176000, C725S019000, C380S044000

Reexamination Certificate

active

07543153

ABSTRACT:
A digital signature generating apparatus generates a digital signature of digital data. The digital signature generating apparatus includes a receiving unit, the secret key changing unit and a digital signature generating unit. The receiving unit receives one of a first command and a second command. The first command includes information indicating one of a plurality of secret keys, and the plurality of secret keys are included in the digital signature generating apparatus. The secret key changing unit changes a secret key used by the digital signature generating apparatus to a secret key specified by the first command, if the first command is received by the receiving unit. The digital signature generating unit generates the digital signature of the digital data from a hash value extracted from the second command, if the second command is received by the receiving unit.

REFERENCES:
patent: 5396558 (1995-03-01), Ishiguro et al.
patent: 5499294 (1996-03-01), Friedman
patent: 6038551 (2000-03-01), Barlow et al.
patent: 6463155 (2002-10-01), Akiyama et al.
patent: 6633980 (2003-10-01), Johnson
patent: 6782103 (2004-08-01), Arthan et al.
patent: 6978017 (2005-12-01), Wiener et al.
patent: 7000112 (2006-02-01), Oishi
patent: 7139407 (2006-11-01), Wakao
patent: 7162637 (2007-01-01), Wakao et al.
patent: 7194630 (2007-03-01), Iwamura et al.
patent: 7234060 (2007-06-01), Amdur et al.
patent: 7296161 (2007-11-01), Wakao et al.
patent: 2002/0060736 (2002-05-01), Wakao et al.
patent: 2003/0002679 (2003-01-01), Akiyama et al.
patent: 2003/0123699 (2003-07-01), Wakao et al.
patent: 2003/0126443 (2003-07-01), Wakao
patent: 2003/0196086 (2003-10-01), Murakami
patent: 2004/0059936 (2004-03-01), Wakao
patent: 2004/0162980 (2004-08-01), Lesenne et al.
patent: 2005/0091497 (2005-04-01), Wakao
patent: 1081915 (2001-03-01), None
patent: 09-200730 (1997-07-01), None
patent: 10031626 (1998-02-01), None
patent: 11088318 (1999-03-01), None
patent: 2000124887 (2000-04-01), None
patent: 2002-244924 (2002-08-01), None
patent: 2002300150 (2002-10-01), None
patent: 2004015598 (2004-01-01), None

Affiliated with

Also associated with

Rating

Digital signature generating apparatus, method, computer... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital signature generating apparatus, method, computer..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital signature generating apparatus, method, computer... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4081545