7. The method of claim 1 wherein the encryption/decryption key is encapsulated in an entitlement control message (ECM).
7. The method of claim 1 wherein the encryption/decryption key is encapsulated in an entitlement control message (ECM). 9. The method of claim 7 wherein the encrypted transport stream further comprises entitlement management message (EMM) packets associated with a subscriber that receives the encrypted transport stream.