Patent ID: 7336785
Filing Date: 2008-02-26
Classification: H04L,H04N

Abstract:
1. A system for copy protecting information, the system comprising: a point of deployment module; and a set-top box including; wherein the set-top box transmits a request message for information, the point of deployment module generates a reply message which includes at least one control information pair, relating to the information, each control information pair having copy control information and a stream identifier, respectively generating a first key in the point of deployment module and a second key in the set-top box, using information associated with each respective device and the at least one control information pair, and the point of deployment module encrypting the information with the first shared key and transmitting the encrypted information to the set-top box, and the set-top box decrypting the encrypted information with the second shared key when the first and second shared keys match.