LICENSE OFFERING DEVICE AND METHOD, CONTENT OFFER DEVICE, SUBSCRIPTION SERVICE OFFERING SYSTEM, REPRODUCING DEVICE AND REPRODUCING METHOD

摘要

PROBLEM TO BE SOLVED: To enable the establishment of a license flexibly for using contents which are delivered to be distributed.;SOLUTION: A content server enciphers a content in offering the content via the Internet to a client. On a header of the enciphered content, attribute information concerning the content is described. The client acquires a license which admits the enciphered content when the client attribute information acquires the license which meets attribute conditions through accessing the license server.;COPYRIGHT: (C)2006,JPO&NCIPI