MULTIPLE MATCHING CONTROL METHOD

摘要

The aim of the invention is to match a security module with one or several host devices in an environment wherein the host module is not provided with a link to the management center. This is achieved by a method for controlling the matching between a first device, such as a removable security module, and a second device, such as a host device. Said matching consists in securing data exchange with the aid of a single matching key. The method consists in verifying the matching between the two devices and using the single matching key if matching has already been carried out. If this is not the case, an empty space is sought in the spaces reserved for matching data in the first case. If this is the case, a matching procedure is initiated wherein a cryptogram, which is contained in the second device, is transmitted, containing an identifier which is specific to said device. Said cryptogram is encrypted by a secret key which is common to all of the first devices. The cryptogram is decrypted by the first device and the identifier of the second device is extracted therefrom. A matching key based on this identifier is generated. The data for matching with the second device is stored in the first device.