METHOD FOR CONTROLLING THE USE OF A CONDITIONAL ACCESS CONTENT AND MULTIMEDIA UNIT FOR IMPLEMENTING SAID METHOD

摘要

The present invention concerns a method for controlling the use of a conditional access content (C 0 ), said content being sent to a plurality of multimedia units (STB) connected to a management center (CG). The method comprises the steps of defining controlled content usage types; defining a set of usage rules (UR) for at least two controlled content usage types by setting condition values for these controlled content usage types;defining at least two content profiles (CP) by associating one usage rule of said at least two controlled content usage types; sending management messages containing the content profiles (CP) to at least a set of multimedia units (STB) linked to said management center;storing the content profiles (CP) in the concerned multimedia units;sending the conditional access content (C 0 ), and joined sending of a control message (ECM) containing at least a means for determining the content profile (CP) that is to be linked to the content (C 0 );further to the reception by a multimedia unit of the encrypted content (C 0 ) and of the corresponding control message (ECM), extracting the means for determining the content profile that is to be linked to the content; searching in the multimedia unit, the content profile corresponding to the means for determining the content profile that is to be linked to the content; and of using the content (C 0 ) by the multimedia unit according to the usage rules contained in the content profile that is to be linked to the content. The invention further concerns a multimedia unit for implementing said method.