| 摘要 |
In a document-management service device including a document-management service unit, a certification information acquisition request containing information specifying an entry limit and/or information specifying a valid duration is received from a client which requests acquisition of a certification information concerning a document. The certification information is created in response to the certification information acquisition request, and transmitted to the client. A document operation request concerning the document is received from the client, the document operation request containing the certification information. A document operation is performed to the document by using an access right of a user of the certification information, in response to the document operation request.
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