Distribution information management system and method

Details Distribution information management system and method Distribution information management system and method

2007-01-02

2007-01-02

Moazzami, Nasser (Department: 2136)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S155000, C713S176000, C713S193000, C380S045000, C380S278000

Reexamination Certificate

active

09454865

ABSTRACT:
Distributors can verify a signature without acquisition of a certificate for each signer from the certificate authority. A signature part calculates a hash value of distribution information and sets it to a variable h (step S412). Signer private information is taken out from a first signer private information storage part and set to the variable d (step S413). A signature key information selection part takes out signature key information corresponding to a product identifier pid from a signature key information storage part and sets it to the variable t, n (step S414). A signature part calculates a first signature value to the variable h by use of signer private information d and sets it to the variable r1(step S415). A distribution information generating part calculates a second signature value to the variable h by use of a signature key information t according to the variable h (step S416). A signature value to the final variable h is calculated by use of the results r1and r2.

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