Utilization of encrypted hard drive content by one dvr...

G - Physics – 11 – B

Patent

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Details

G11B 20/00 (2006.01) H04N 7/167 (2006.01)

Patent

CA 2577633

A system and method for encrypting and recording content to removable storage media for use by multiple set-tops. When content is recorded to the storage media, the content is encrypted with a content instance key. This content instance key is encrypted with the public key of one set-top box and a duplicate of the content instance key is encrypted with the public key of another set-top box. Either set-top box may decrypt the content instance key with the private key that corresponds with its public key so that the encrypted content from the removable storage media may be made available in the clear.

L'invention porte sur un système st sur un procédé de codage et d'enregistrement d'un contenu dans un support de stockage amovible destiné à être utilisé par plusieurs boîtiers-décodeurs. Lorsque le contenu est enregistré dans le support de stockage, ce contenu est chiffré par une clé d'instance. Cette clé d'instance est chiffrée par la clé publique d'un boîtier-décodeur et une reproduction de la clé d'instance est chiffrée par la clé publique d'un autre boîtier-décodeur. L'un ou l'autre des boîtiers-décodeurs peut décoder la clé d'instance avec la clé privée qui correspond à sa clé publique de sorte que le contenu chiffré du support de stockage amovible puisse être rendu disponible en clair.

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