| 摘要 |
The invention relates to a method for releasing customer-specific access authorisations in conditional-access systems for receiving chargeable media services, using security modules, such as smart cards, in which security algorithms and/or customer-specific authorisations are stored in the form of software programmes. At the request of a service provider, for example, a telecom shop or another institution which is authorised to sell security modules, a service centre which is responsible for controlling authorisations sends an entitlement management message (EMM) release signal to the service provider which is allocated uniquely to the security module by indirect release, either using a telephone or remote data transmission system. Once received, the EMM release signal for the relevant media service is stored in a control device of the service provider, issued to the security module and said security module is then activated by this EMM release signal, using the control device. In the direct release procedure, the service centre uses an additional data transmission service in a digital radio broadcasting network, such as the DAB synchronised network, to send the uniquely allocated EMM release signal to the security module of the customer concerned and the centre then activates said module.
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