Patent ID: 7433472
Filing Date: 2008-10-07
Classification: H04L,H04N

Abstract:
1. A method of generating cryptographically protected digital data encoding content and arranged into messages, each message being decodable by a decoder application on a client terminal having a service interface to assemble each message for the decoder application, the method including: retrieving a message from a machine-readable medium; encrypting at least part of the message; and providing the encrypted messages as output in a format enabling a server service interface to arrange the message into at least one packet including at least one header and a payload, each payload including at least part of the message, at least one header including information enabling the service interface on the client to assemble each message for the decoder application from the payload of the packets, wherein the method further comprises separating each message into a first and at least one further message section, wherein at least one of the message sections is encrypted in such a way as to be decryptable independently of the other message sections, and wherein the encrypted message is assembled by adding a resynchronisation marker, separating a message section from an adjacent message section and including explicit synchronisation information, to at least the further message sections.