A method and system for attaching a title key to encrypted content for
synchronized transmission to, or storage by, a recipient is provided.
Specifically, under the present invention, an elementary media stream is
parceled into content units that each include a content packet and a
header. The content packets are encrypted with one or more title keys.
Once the content packets have been encrypted, the title keys are
themselves encrypted with a key encrypting key. The encrypted title keys
are then attached to the corresponding encrypted content packets for
synchronized transmission to a recipient.