Viaccess

Les Collines De I'arche-tour Opera

Bruno Tronel

Quentin Chieze

Olivier Granet

Frédéric Beun

Laurence Boudier

Pierre Roque

Franck Baudot

Louis Neau

Alain Cuaboz

Alexandre Giard

Matthieu Roger

The invention relates to a method for the identification of security processors in a system for delivering protected multimedia content, in which: upon request from an identification device, a network head-end transmits () a command to suspend a first identified pre-determined security processor which, in response, switches () from an active state to an idle state; the sharing server detects () that the first security processor is in the idle state and then transmits () access control messages to a second security processor instead of the first security processor; in response to the identification of at least the second security processor, upon request from the identification device, the network head-end transmits () a command to re-establish the first security processor, and, subsequently, in response, the first security processor switches () from the idle state to the active state.

Method for the identification of security processors

The invention relates to a method of transmitting at least one additional piece of data D in a list of access control words CWto a scrambled content transmitted by a content server of an operator to a user equipment () including a reception terminal () associated with a security processor (), each control word CWof said list being designed to descramble said contents during a determined cryptoperiod,

Method of transmitting an additional piece of data to a reception terminal

This method of receiving a multimedia signal scrambled by means of a control word uses a first cryptographic entity that can be connected to any one of P second cryptographic entities to form part of a device for receiving the scrambled multimedia signal. Only second cryptographic entities of a group of N second cryptographic entities selected from a wider set of P second cryptographic entities use a session key obtained by diversifying a root key identical to the root key used to obtain the session key of the first cryptographic entity.

Method and a system for receiving a multimedia signal, a cryptograophic entity for said reception method and system, and a method and a black box for producing said cryptographic entity

The invention relates to a method for matching a number N of reception equipment with a number M of external security modules, each reception equipment being provided with a unique identifier, and each external security module having a unique identifier and containing information about access rights of a user to digital data distributed by an operator. The method comprises the following steps:

Process for matching a number N of reception terminals with a number M of conditional access control cards

This invention relates to a method for broadcasting digital data to a targeted set of reception terminals in which said data are previously scrambled by a series of control words transmitted in a conditional access control message. This method comprises the following steps:

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Courbevoie, France

Bruno Tronel