| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and device for indirectly receiving the time authentication of a plurality of files by receiving time zone authentication in a summarized form without respectively receiving time authentication. SOLUTION: This time authentication automatic acquisition method comprises: a first step for registering and storing the hash value of a file being the object of authentication in a hash value list for time zone authentication until a preliminarily set acceptance end time comes; a second step for transmitting the hash value of a hash value list for time zone authentication to a time authentication institute when the acceptance end time comes, and for registering an authentication token received in response to this and the hash value list for time zone authentication in the system; and a third step for registering the hash value of the authentication token in a new hash value list for time zone authentication for receiving the time band authentication the next, and for specifying the acceptance start time of the new hash value list for time zone authentication. Those first to third steps are repeatedly executed so that the time zone authentication for the plurality of files is executed. COPYRIGHT: (C)2006,JPO&NCIPI
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