Patent ID: 8488786

Claim:
A method of managing sending of multimedia contents to a mobile terminal equipped with a security module, said multimedia contents being sent in encrypted form from a broadcast server and via a communications network, the method comprising the steps of: a) sending to the mobile terminal rights-of-use data for the multimedia content; b) storing said rights-of-use data in the security module of the mobile terminal; c) generating a series of encryption/decryption keys, the series of decryption keys being generated from said rights-of-use data stored in the security module; d) sending the multimedia content to the mobile terminal, said multimedia content being encrypted with successive keys from the series of encryption keys that has been generated; and e) the mobile terminal receiving the multimedia content and decrypting the multimedia content using the decryption keys from the series of decryption keys generated in the security module of the mobile terminal; wherein the broadcast server encrypts each frame of the multimedia content with an encryption key, which is distinct from the successive keys from the series of encryption keys, such that each frame is identified by a distinct encryption key, the security module of the mobile terminal generating the series of decryption keys which correspond to the series of encryption keys; and wherein said method further comprises, in an event of an interruption of sending the multimedia content to the mobile terminal from the broadcast server, a step f) the mobile terminal sending the broadcast server the distinct encryption key being used at a time of the interruption and a step g) resuming sending the multimedia content to the mobile terminal as a function of said distinct encryption key sent by the mobile terminal at step f).