Method and system for assuring an original

Details Method and system for assuring an original Method and system for assuring an original

2007-07-24

2007-07-24

Zand, Kambiz (Department: 2134)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S168000, C382S276000, C705S075000

Reexamination Certificate

active

10234462

ABSTRACT:
In using log lists of chain signatures to assure validity of an original, work of opening log lists to the public is reduced. A first signature server2generates a first chain signature to an original as an object of assurance, adds the generated first chain signature to a first log list, associating the first chain signature with the original, and sends a first certificate of custody including the first chain signature, to the sender of the original. Further, the first signature server2sends an arbitrary first chain signature in the log list to a second signature server3, to receive a second certificate of custody. On the other hand, the second signature server3generates a second chain signature to the first chain signature received from the first signature server2, adds the second chain signature to a second log list, associating the second chain signature with the first chain signature, and sends a second certificate of custody including the second chain signature, to the sender of the first chain signature. Further, the second signature server3sends an arbitrary second chain signature in the second log list to a public server4.

REFERENCES:
patent: 5136646 (1992-08-01), Haber et al.
patent: 5956404 (1999-09-01), Schneier et al.
patent: 6868406 (2005-03-01), Ogg et al.
patent: 2001-331104 (2001-11-01), None
patent: 3278721 (2002-02-01), None
patent: WO 92/03000 (1992-02-01), None
Schneier, Bruce, Applied Cryptography, Second Edition: Protocols, Algorithms, and Source Code in C. John Wiley & Sons,□□Inc. , 1996. pp. 48-49.
Alibi Establishment for Electronic Signatures: How to prove that you did not make the electronic signature in question even when the base cryptosystem was collapsed Part 1. Concepts and Basic Schenes, Tsuyoshi Matsumoto and others.
“Alibi Establishment for Electronic Signatures; How to prove that you did not make electronic signature in question even when the base cryptostem was collapsed” Part 2. Concrete Schemes and Evaluation Seiichi Susaki and others.
B. Schneier “Applied Cryptography Second Edition”, John Wiley & Sons, Inc. 1996, pp. 75-79.

Affiliated with

Also associated with

Rating

Method and system for assuring an original does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for assuring an original, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for assuring an original will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3728644