System and method for copy protection for digital signals

Details System and method for copy protection for digital signals System and method for copy protection for digital signals

G - Physics

11

B

G11B 23/28 (2006.01) G06F 12/14 (2006.01) G11B 20/00 (2006.01) H04N 5/913 (2006.01) H04N 7/16 (2006.01) H04N 7/167 (2006.01)

Patent

CA 2318509

Embodiments of the present invention provide for the copy protection of distributed material after conditional access is applied, regardless of where the material is distributed. The solutions described provide the advantage of being sufficiently simple in implementation to qualify as "curb high" solutions. "Curb high" solutions provide a range of security from minimal security to a high level of security while requiring relatively fewer system resources to implement than prior approaches.

Des modes de réalisation de l'invention permettent d'assurer une protection contre la copie de matériel diffusé après application d'un accès conditionnel, quel que soit le lieu de diffusion du matériel. Les solutions proposées offrent l'avantage d'être suffisamment simples à mettre en oeuvre pour pouvoir être qualifiées de solutions "haute protection". Ces solutions assurent une gamme de sécurité allant d'une sécurité minimale à un haut niveau de sécurité, tout en nécessitant la mise en oeuvre de relativement moins de ressources de système par rapport aux approches de la technique antérieure.

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