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Contents playback control system by synchronization key

IP.com Disclosure Number: IPCOM000014548D
Original Publication Date: 2002-Mar-01
Included in the Prior Art Database: 2003-Jun-19

Publishing Venue

IBM

Abstract

This is the disclosure content. This disclosure explains the m edia replay m ethodology w hen the client is connected to the netw ork dedicatedly. T he m edia is distributed freely ,but it needs the authorization keys w hen it is replayed therefore the num ber of replay is controlled by the server even though the m edia exists in the client. T he m edia is devided into m any blocks and encrypted w ith keys w hich decodes each block w hen the series of keys are sent to the user.