Method for protecting the audio/visual data across the nrss...

Details Method for protecting the audio/visual data across the nrss... Method for protecting the audio/visual data across the nrss...

H - Electricity

04

N

H04N 7/16 (2006.01)

Patent

CA 2318936

A system for enhancing the security of the interface between a consumer electronic device and a removable security device is provided by protecting the audiovisual (A/V) stream descrambled in the removable security device. The protection involves dynamically computing a shared key followed by the rescrambling of the A/V stream.

On décrit un système qui permet d'améliorer la sécurité de l'interface entre un dispositif électronique de consommation et un dispositif de sécurité remplaçable. Cette sécurité s'obtient par la protection du flux audiovisuel (A/V) désembrouillé au niveau du dispositif de sécurité remplaçable. Ladite protection consiste à effectuer un calcul dynamique d'une clé partagée, puis à brouiller de nouveau le flux audiovisuel (A/V).

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