Flexible TS based content protection

摘要

Method and apparatus for encrypting a media stream sent from a server 2 via an encryption proxy 3 to a client 4, connected to the encryption proxy 3 over a network 7, where packets of the media stream are either statically encrypted by a pre-processor 1 or dynamically encrypted by the encryption proxy 3. The pre-processor 1 selects which packets of the media stream that are to be statically encrypted and which packets that are to be dynamically encrypted as defined in an encryption scheme 5.