Patent ID: 6650754
Filing Date: 2003-11-18
Classification: H04H,H04L,H04N

Abstract:
A broadcast reception device, comprising:storage means 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 receiver configured to receive encrypted contents information delivered from a broadcast station by broadcast; a decryption unit configured to decrypt 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 by which decryption of the encrypted contents information and a reception device ID can be controlled in correspondence; and control means for selectively acquiring from the encrypted reception contract information decrypted by the decrypting means one contract information corresponding to a reception device ID that coincides with said one reception device ID, and controlling whether or not to give the channel key to the decrypting means according to said one contract information.