Patent ID: 6526508
Filing Date: 2003-02-25
Classification: H04J,H04L,H04N

Abstract:
A method for authenticating information in a conditional access cable television system comprising head-end equipment and a plurality of set-top terminals in communication therewith, the head-end equipment including a controller and a plurality of transaction encryption devices associated with a plurality of entitlement agents for providing information to the plurality of set-top terminals, the controller controlling access to the conditional access cable television system, the method comprising:processing at least a segment of downloadable information provided from a source to generate a digest thereof, wherein the downloadable information includes a logic segment; associating a source identifier with the downloadable information, wherein the source identifier is associated with the provider providing the downloadable information; and transmitting a message to at least one set-top terminal, the message including the downloadable information, the digest and the source identifier.