Patent ID: 7590241

Claim:
A receiver for receiving a broadcast signal that includes a program signal and an encryption information signal relating to the program signal, said receiver comprising: a FAT demodulator to demodulate the received program signal; a FDC demodulator to demodulate the received encryption information signal relating to the program signal; a first decryption circuit to decrypt the program signal received by the FAT demodulator; a detector to detect the encryption information signal relating to the program signal demodulated by the FDC demodulator; a streaming switch circuit to, on the basis of the encryption information signal relating to the program signal detected by the detector, selecting either the program signal coming from the FAT demodulator or the program signal coming from the decryption circuit; and a first decoder to decode output from the streaming switch circuit, wherein the FAT demodulator and the FDC demodulator are independent respectively; a second encryption circuit to encrypt the program signal output from the streaming switching circuit, the program signal being encrypted when the program signal is output to an external device; and an external-device output unit to output to the external device a signal encrypted by the second encryption circuit; on the basis of the encryption information of the program, said external-device output unit makes a judgment as to whether or not the program is scrambled, and if it is judged that the program is scrambled, the external-device output unit outputs a signal coming from the second encryption circuit, whereas if it is judged that the program is not scrambled, said external-device output unit outputs a signal output from the streaming switch circuit.