| 摘要 |
The invention relates to a method of managing the rights of subscribers to a pay television system comprising an access control system (CAS) having subscriber management systems (SMS1, SMS2, SMS3), which are each managed by an operator (OP1, OP2, OP3), and a plurality of subscriber decoders (STBn) connected thereto. Each of the aforementioned decoders (STBn) is equipped with a security module (SMn) containing the rights specific to each subscriber, thereby enabling same to decrypt encrypted digital data from a flow broadcast by at least one operator (OP1, OP2, OP3). Moreover, when rights are being modified by an operator in the security module (SMn) of a subscriber, the access control system (CAS): (i) receives data identifying a subscriber (IDSMn) together with commands for the modification of the rights C(Dm) of the subscriber from a subscriber management system (SMS1, SMS2, SMS3) of an operator (OP1, OP2, OP3), (ii) generates an entitlement management message (EMM1) containing the modified rights (Dm), and (iii) transmits said message (EMM1) to the security module (SMn) of the subscriber by means of the flow containing the encrypted data. The inventive method is characterised in that the modifications are verified as a function of the properties and available resources of the security module (SMn) and in that the entitlement management message (EMM1) containing the modified rights (Dm) is generated when the result of the verification is positive. |
