Methods and devices for managing traffic keys during a multi-media session

摘要

The present invention provides methods, apparatuses, and systems for delivering protected multimedia content to a receiving device. Portions of protected multi-media content and associated key information are inserted in a same time slice burst. Multi-media content is processed into a plurality of content datagrams, in which each content datagram is associated with a corresponding component. Key information may be processed as a keystream that is logically separate from the components. A content datagram may be encrypted with an associated key. A receiving device receives the time slice burst with the plurality of content datagrams and associated key datagrams of the keystream. The receiving device consequently decrypts the plurality of content datagrams. Also, key information may be processed as key datagrams that are included with at least one component, in which each component comprises an associated plurality of content datagrams.