Method and a security module configured to enforce processing of management messages

A method to enforce processing of management messages by a security module associated to a multimedia receiver configured to receive access controlled multimedia services, the management messages received from a managing center by the multimedia receiver being processed by the security module, the method comprising steps of:

• receiving, by the security module, at least one global management message addressed to all multimedia receivers associated with the managing center;
• tracing, by the security module, the processing of said at least one global management message by setting a state in memory of the security module, the state defining a successful process while an unsuccessful or a partial processing of the global management message results in an absence of the state;
• receiving, by the security module, at least one positive addressing management message specifically addressed to a predefined group that includes said security module but does not include all multimedia receivers associated with the managing center, the at least one positive addressing management message comprising an identifier of the security module associated with commands and parameters for setting up in said security module access rights to multimedia services;
• and
• processing the positive addressing management message only if the state set during tracing of the processing of the at least one global management message indicates a successful processing of the at least one global management message, thereby allowing the multimedia receiver access to multimedia services, wherein the state is reset only after processing a last positive addressing management message in a sequence of positive addressing management messages, said state being renewed after successful processing of a next global management message.