Title: Signature log storing apparatus, method and program
Application Number: 200610073149 Application Date: 2006.04.06
Publication Number: 1949308 Publication Date: 2007.04.18
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G09C1/00
Applicant(s) Name: Hitachi Ltd. Address:
Inventor(s) Name: Itoh Shinji;Honda Yoshinori;Nunokami Hiroyasu;Saka
Attorney & Agent: xujing
Abstract:
    A signature log storing apparatus includes a signature log list and a certificate list, and registers, in the signature log list, a part of signature information in generated hysteresis signature as a signature record and a part of a user certificate in the certificate list. The signature log storing apparatus further includes a trust point list and validates a signature records registered in the signature log list and registers identification information for identifying a latest signature record out of the validate signature record, evidence information for validating validity of the user certificate for a validated signature record, and a hash value of information derived by connecting the evidence information and the hash value as needed or before the user certificate expires.
Time: 10
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