Patent ID: 7627762
Filing Date: 2009-12-01
Classification: H04L,H04N

Abstract:
1. Device for signing digital streams for transmission via a communication network, said device producing at least one signature for incorporation in said digital streams from encrypting applied to said digital streams, each of said digital streams comprising several information entities, said entities including: contents, related to at least audiovisual information, and at least one signalling, made of an information set related to origins, destinations and structuring of said contents, said signaling being modifiable in networks due to network requirements, said signaling containing essential data structures called descriptors, and being built mainly by means of arranged groupings called tables, wherein said device can includes means for applying encrypting to at least said signaling, and more specifically to selectively determined descriptors among said descriptors of said signaling, called authenticated descriptors, that remain untouched by re-multiplexing steps in the network head-ends.