Method for storing encrypted data

H - Electricity – 04 – N

Patent

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Details

H04N 21/433 (2011.01) H04N 21/4408 (2011.01)

Patent

CA 2432445

The objective of the present invention is to propose a method to prevent that the decryption of a keys file of a group of data stored in a storing unit (DB) of a decoder (STB), the latter comprising a security module) allows many bad intentioned users to benefit illegally from this product. This method consists in extracting from an encrypted data flux the data to send towards the storing unit (DB) and to re-encrypt the data before transferring them to the storing unit (DB) by at least one specific key (K1, K2).

Le but de la présente invention est de proposer une méthode pour empêcher que le décryptage d'un fichier de clés d'un ensemble de données stocké sur une unité de stockage (DB) d'un décodeur (STB), ce dernier comprenant un module de sécurité (SM), permette à de nombreux utilisateurs malveillants de bénéficier de ce produit illicitement. Cette méthode consiste donc à extraire d'un flux de données encryptées les données à envoyer vers l'unité de stockage (DB) et à re-encrypter les données avant leurs transferts dans l'unité de stockage (DB) par au moins une clé (K1, K2) unique.

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