| 摘要 |
PROBLEM TO BE SOLVED: To reply an appropriate result even when a new path exists after a path retrieval time, and to reduce the time it takes to receive a result after an end entity requests validity confirmation of a public key certificate. SOLUTION: In a station device for confirming validity of a certificate, retrieval of a path and the verification of the retrieved path are carried out; the results of the retrieval and the verification are stored in a storage section; when a valid path corresponding to the validity confirmation request is registered in the storage section based on the validity confirmation request of the public key certificate, verification is carried out using the path; and, when the valid path corresponding to the validity confirmation request is not registered in the storage section, a new path is retrieved and verified, and thereby validity confirmation of the public certificate is carried out. COPYRIGHT: (C)2010,JPO&INPIT
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