| 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 | ||
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Abstract: |
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| 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. | |||
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| Time: | 10 | ||
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