Patent ID: 8225344

Claim:
A video processing apparatus comprising: a signal receiver receiving, through a channel selected by a user, an encrypted video signal which comprises decryption information and access rights information of a transmitting side with respect to a conditional access (CA) device; an information extractor extracting the access rights information of the transmitting side and the decryption information, from the received video signal; and a controller controlling a storage unit, which is not included in the CA device, to receive and store the access rights information of a receiving side with respect to the CA device, sending the extracted decryption information to the CA device if it is determined that the access rights information of the transmitting side matches the access rights information of the receiving side stored in the storage unit, wherein the CA device uses the decryption information received from the controller to determine whether the user is authorized to access the channel, and decrypts the encrypted video signal based on the decryption information received from the controller, and, if the user is determined as not being authorized, the CA device does not decrypt the encrypted video signal.