MATCH CONTROL METHOD

摘要

The invention aims at providing a method which guarantees encryption of data exchanged between a security module and a user unit through a matching key specific to the user unit/security module pair, while allowing the possibility to the security module to be matched with other units. Therefor, the invention provides a method which consists in: detection by the user unit whether the connected security module is matched therewith; if that is so, using a unique key specific to the user unit/security module pair to encrypt the exchanged data; otherwise, requesting from the management centre authorisation to be matched with said security module, the request being accompanied by identifiers of the user unit and of the security module; verification by the management centre the conformity of said matching and transmission of the result to the user unit; if authorisation is granted, establishing a unique key specific to the user unit/security module pair to encrypt the exchanged data.