> How about the scrambling with CAS ? it encrypts the content bits & on top of > it also provides the Pipe protection , correct ? CAS in the traditional end to end broadcast system provides the pipe through which content flows and is thus encrypted, depending on where in the transport layer you implement the scrambling mechanism (i.e. IP frames carried in MPEG). Cheers Kon ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.