France Telecom

Pascal Chauvaud

Henri Gilbert

Olivier Ondet

Axel Ferrazzini

Michel Milhau

Diego Anza

A method of managing the sending of multimedia contents to a mobile terminal () equipped with a security module (), the multimedia contents being sent in encrypted form from a broadcast server () and via a communications network (). The method comprises the following steps: a) sending to the mobile terminal () rights-of-use data for a 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 rights-of-use data stored in the security module (), d) sending the multimedia content to the mobile terminal (), the 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.

Security method and device for managing access to multimedia contents

A system that distributes content access data which provides rights management data indicating a right of a user to reproduce and/or copy the distributed content. The system includes an applications device including a trusted player for receiving, reproducing and/or copying the content, and a smart card access device for accessing a smart card, such as a Subscriber Identity Module (SIM), which is uniquely associated with the user. A trusted server communicates the content access data to the smart card via a communications network by encrypting the content access data using an encryption key pre-stored on the smart card and known to the trusted server. A facility is thus provided for cost effectively distributing content and managing rights in the content using security facilities inherent in the smart card.

Growing community of inventors

Issy les Moulineaux, France

Pascal Chauvaud