Method and apparatus for providing a secure trick play

Details Method and apparatus for providing a secure trick play Method and apparatus for providing a secure trick play

H - Electricity

04

N

H04N 21/2347 (2011.01) H04N 21/4147 (2011.01)

Patent

CA 2684393

A process may be utilized by a DVR. The process characterizes a set of content as a plurality of segments as the set of content is received. Each of the segments has a segment length according to a predetermined time interval. Further, the process encrypts each of the segments with a corresponding content encryption key to generate a plurality of encrypted segments. The corresponding content encryption key for each of the segments is generated by the DRM component. In addition, the process stores each of the encrypted segments for playback with trick play features in accordance with an expiration content rule having a time limit on the temporary playability of the set of content.

L'invention concerne un procédé pouvant être utilisé par un DVR. Ce procédé caractérise un ensemble de contenu comme une pluralité de segments lorsque l'ensemble de contenu est reçu. Chaque segment possède une longueur qui dépend d'un intervalle de temps prédéfini. En outre, le procédé crypte chaque segment au moyen d'une clé de cryptage de contenu correspondante afin de produire plusieurs segments cryptés. La clé de cryptage de contenu correspondante pour chaque segment est produire par le composant DRM. Par ailleurs, le procédé stocke chaque segment crypté pour une lecture en mode d'enrichissement en fonction d'une règle de contenu d'expiration à limite temporelle quant à la jouabilité temporaire de l'ensemble de contenu.

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