Patent ID: 8774405
Filing Date: 2014-07-08
Classification: G06F,G06T,H04H,H04L,H04N

Abstract:
1. An identity module of a subscriber to a program broadcasting service, said identity module configured to communicate with a terminal, wherein at least one program being broadcast in the form of at least one message includes an enciphered content and at least one key message, said at least one key message including an enciphered value of a traffic key, the traffic key enabling said terminal to decipher said enciphered content included within said at least one message, said identity module comprising: a memory for storing a service key for deciphering the traffic key, wherein said identity module is further configured to (i) extract, from said at least one key message, validity period extension information, and (ii) transmit, if the validity period extension information certifies that said at least one key message is associated with a program extension, to the terminal, a value of the traffic key associated with the enciphered content.