Patent ID: 6463155
Filing Date: 2002-10-08
Classification: H04H,H04L,H04N

Abstract:
A broadcast reception device, comprising;a memory for storing a master key commonly provided with respect to a plurality of broadcast reception devices and one reception device ID uniquely assigned to said broadcast reception device; a reception unit for receiving encrypted contents information delivered from a broadcast station by broadcast; a decryption unit for decrypting encrypted reception contract information using the master key and the encrypted contents information using a channel key, the encrypted reception contract information being received from the broadcast station and containing at least a contract information for controlling decryption of the encrypted contents information and a reception device ID in correspondence; and a control unit for selectively acquiring one contract information corresponding to a reception device ID that coincides with said one reception device ID, from the encrypted reception contract information decrypted by the decryption unit, and controlling whether or not to give the channel key to the decryption unit according to said one contract information.