Method for matching a multimedia unit and at least one operator, multimedia unit, operator and personalisation entity for implementing said method

摘要

The present invention relates in particular to a method of pairing between a multimedia unit (STB) and at least one operator (Op), the multimedia unit (STB) being intended to receive conditional access data of said operator (Op), the multimedia unit having a multimedia unit identifier (U ID), the operator having an operator identifier (O ID), the method being characterized in that:the multimedia unit receives a multimedia unit key formed by applying a first cryptographically secure function to a personalization key and to the identifier of the multimedia unit;the operator receives an operator key formed by applying a second cryptographically secure function to said personalization key and to the operator identifier;said multimedia unit further having a function of the multimedia unit and said operator further having a function of the operator, these functions being such that the result of the application of the function of the operator to said operator key and said media unit identifier is equal to the result of applying the function of the multimedia unit to said multimedia unit key and said operator identifier, this result forming a matching key between said multimedia unit and said operator.