| 摘要 |
The present invention concerns a method for controlling the use of a conditional access content (C0), 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 (C0), 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 (C0); further to the reception by a multimedia unit of the encrypted content (C0) 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 (C0) 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.
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