Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
Server/client system for managing the transmission and use of copyrighted content, information processing unit, information processing method, and computer program
A method of information processing in a server/client system including a server for storing content and a client for receiving from the server and storing copy content of the content stored in the server. The method includes the steps of: the server generating at least either a content-ID list storing content-IDs corresponding to content for which use-expiration-date updating is permitted out of the copy content stored in the client or a content-ID list storing content-IDs corresponding to content for which use-expiration-date updating is not permitted, transmitting the content-ID list to the client; and the client selectively performing update processing of use-expiration date out of the copy content stored in that client or invalidation processing of the copy content stored in that client based on the content-ID list received from the server.
Sony Corporation
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inventional inventional inventional
Hisato Yasushi Kazuhiko Takehiko
Shima Minoya Takabayashi Nakano