METHODS FOR BROADCASTING AND RECEIVING A SCRAMBLED MULTIMEDIA PROGRAMME, NETWORK HEAD, TERMINAL, RECEIVER AND SECURITY PROCESSOR FOR THESE METHODS

摘要

A method of broadcasting a scrambled multimedia programme, by way of a broadband network, in which before transmitting a license key:—a network head carries out a step of authenticating a terminal, and—if the terminal has been successfully authenticated, the network head sends the terminal a license transmission message containing the license key or cryptogram of the license key, by way of a point-to-point link, and—if the terminal is not successfully authenticated, the network head acts (at 200) in such a way as to prevent the complete descrambling by this terminal of the scrambled multimedia programme broadcast.