| 摘要 |
A document management apparatus (10) receives an acquisition request of authentication information from a client that requests acquisition authentication information regarding the documents or the document storing means for storing the documents, the authentication information containing information regarding a time limit of use of the authentication information and/or information regarding a number of times of use of the authentication information. The authentication information is produced in accordance with the acquisition request of the authentication information, and is sent to a client. The document management apparatus (10) receives a request containing the authentication information from the client that has sent the authentication information or a client different from the client that has sent the authentication information. The document management apparatus determines validity of the authentication information contained in the request.
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