Fremgangsmate ved overforing og mottagning av omkastet datastrom, og tilsvarende dekoder og kombinasjon av dekoder og deri innfort flyttbar sikkerhetsmodul

摘要

A method and apparatus for the transmission and reception of scrambled data is disclosed. In some embodiments, the method and apparatus includes transmitting a scrambled data stream to a decoder, sending the scrambled data stream to a portable security module inserted in the decoder, descrambling the scrambled data stream, encrypting a descrambled data stream, and using the encrypted data stream to the decoder, decrypting the encrypted data stream, and using the decrypted data stream.