| 摘要 |
<p>The objective of the present invention is to propose a method that guarantees the encryption of the exchanged data a security module and a user unit by a pairing key specific to the couple user unit/security module, and at the same time leaving the possibility for the security module to be paired with other user units. According to the invention, this objective is achieved by a method consisting in: - detecting by the user unit if the connected security module is paired with it, - if it is so, using a unique pairing key specific to the couple user unit/security module to encrypt the exchanged data, - if it is not so, requesting the operating centre the authorisation to pair with this security module, a request accompanied by the identifications of the user unit and the security module, - verifying by the operating centre the conformity of this pairing request and transmitting the result to the user unit, - if the authorisation is given, establishing a paring key unique to the couple user unit/security module to encrypt the exchanged data.</p> |
