RECEPTION AND ISSUANCE PROCEDURES FOR A MULTIMEDIA, RECEIVER, ISSUER AND RECORDING SUPPORT AND SECURITY PROCESSOR CONTENT FOR THIS PROCEDURE.

摘要

Procedure for receiving a first randomized multimedia content whose visualization is conditional on the previous display of second randomized multimedia contents, these second multimedia contents being the only ones that are associated with access control messages containing a cryptogram of a control word for desalting them and some instructions of progression of the value of the same counter, instructions of progression these that modify all of them the value of that same counter in the same sense when they are executed by an electronic receiver of the first and second multimedia contents, characterized in that this procedure it comprises: - each time a second multimedia content is displayed with the help of the electronic receiver, the modification (114) of the counter value based on the progression instructions associated with that second multimedia content, - the memorization (114) of the value of that count or between non-consecutive visualizations of second multimedia contents broken by the display of other multimedia content that does not modify the counter value, - the conditioning (118; 98) of the display of the first multimedia content at a predetermined value of the counter, and - each time the display of the first multimedia content is authorized with the help of the electronic receiver, the procedure comprises the modification (120; 164) of the counter value in a sense opposite to the instructions of progression.