Patent ID: 7809139

Claim:
A method of processing data for a receiver, the method comprising: receiving, by a receiving unit, a broadcast signal comprising fast information channel (FIC) data including cross layer information for mobile service acquisition, transmission parameter channel (TPC) data including FIC version information for identifying an update of the FIC data, and mobile service data, wherein the mobile service data is packaged into a Reed-Solomon (RS) frame which belongs to an ensemble; demodulating, by a demodulator, the broadcast signal; forming, by a processor, the ensemble from the demodulated broadcast signal and acquiring a service map table (SMT) from the ensemble, the SMT including Internet Protocol (IP) access information and encryption information of the mobile service data; and decrypting, by the processor, the mobile service data included in the ensemble in accordance with the IP access information and the encryption information of the mobile service data, wherein the SMT further includes IP access information for accessing to an IP datagram of key information for decryption of the mobile service data.