Patent ID: 9166980
Filing Date: 2015-10-20
Classification: G06F,G11B,H04L

Abstract:
1. A content management system including: a recording medium for storing content; a terminal device for using the content; and a server for communicating with the terminal device and judging whether to permit use of the content, the server comprising: a notification storage unit storing notifications to be presented to a user of the terminal device; a usage permission judgment unit configured to receive, from the terminal device, (i) a request for permission to use the content and (ii) information necessary for judgment of whether to permit use of the content, and to judge whether to permit use of the content based on the request and the information; and a communication unit configured to transmit, to the terminal device, information necessary for use of the content when the usage permission judgment unit judges affirmatively, and to transmit, to the terminal device, a corresponding one of the notifications when the usage permission judgment unit judges negatively, the recording medium comprising a request unit configured to output, to the terminal device, the request and the information necessary for the judgment of whether to permit use of the content, and the terminal device comprising: a transmission/reception unit configured to transmit the request and the information necessary for the judgment to the server, and receive either the information necessary for use of the content or the notification from the server; and a presentation unit configured to present the notification, wherein the notifications correspond to attributes of contents, the communication unit is further configured to receive the request for permission to use the content, and, as the information necessary for the judgment, information that includes the attribute of the content, and transmit the notification corresponding to the attribute of the content when the usage permission judgment unit judges negatively, the server further comprises a revocation information storage unit storing, for each content, revocation information indicating the attribute of the content and one or more revoked terminal devices not permitted to use the content, the information necessary for the judgment of whether to permit use of the content, transmitted by the transmission/reception unit to the server, includes the attribute of the content corresponding to the request, and terminal device information for identifying a terminal device, the usage permission judgment unit judges negatively with respect to the request, if the terminal device identified by the terminal device information is indicated by the revocation information corresponding to the content pertaining to the request, and judges affirmatively with respect to the request if the terminal device identified by the terminal device information is not indicated by the revocation information, and the communication unit transmits the notification corresponding to the attribute of the content to the terminal device that has transmitted the request, when the usage permission judgment unit judges negatively with respect to the request.