Generating a scrambled data stream

Details Generating a scrambled data stream Generating a scrambled data stream

H - Electricity

04

N

H04N 21/2347 (2011.01) H04L 9/00 (2006.01)

Patent

CA 2724932

A method and a system for generating a scrambled data stream is described, wherein the method comprises: providing a code book comprising code information for scrambling data in data stream comprising one or more service streams; generating a control word request associated with at least one crypto period in at least one of said service streams; in response to said control word request, generating on the basis of said code information at least one control word associated with said crypto period in said service stream; and, scrambling data associated with at least one of said service streams using said control word.

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