Computational efficiently obtaining a control word in a...

Details Computational efficiently obtaining a control word in a... Computational efficiently obtaining a control word in a...

H - Electricity

04

N

H04N 21/418 (2011.01) G06F 12/02 (2006.01) G06F 17/14 (2006.01) G06K 19/07 (2006.01)

Patent

CA 2726501

The invention provides a receiver, a smartcard and a conditional access system for securely obtaining a control word using an entitlement transform tree, wherein intermediate results are cached to improve computational efficiency.

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