Fremgangsmåde til adgangskontrol af betingede adgangsdata

摘要

The method involves sending a control message containing a control word to a security module, determining a validity date of the message decryption rights associated to the module, and determining a present date. The present date is compared with an expiration date of the rights to find whether the present date is prior to the expiration date. A multimedia unit receives an authorization message. The authorization message contains a validity date later than the present validity date and a value to be introduced into a counter of the security module, where the validity date is intended for the security module. An independent claim is also included for a security module for the access to conditional access data.