Scrambled broadcast MPEG digital word stream access control having transmit control access message and reread stream function key/further criterion and reception recording/reread only authorized following criteria verification.

摘要

The access control method generates at transmission a control access message for the digital stream. A message is then generated to reread the stream as a function of the key and a further criteria. At reception the message is analyzed and recording authorized only if criteria is verified. The message is then analyzed and the reread only authorized if the criteria set is verified.