DEVICE WHICH CAN USE SECURE INTERNAL OR EXTERNAL SOFTWARE AND CORRESPONDING USE METHOD

摘要

The invention relates to a device which can use secure internal or external software and to the corresponding use method. The inventive device contains an application software module (110) which can use a secure software module (112, 212). The device also comprises a module (111) which is responsible for selecting the secure software module that to be used from a secure software module that is internal (112) to the device and an external secure software module (212) contained in a removable processor which can be inserted into the device. The aforementioned selection is preferably made according to the version numbers associated with the internal and external secure software modules. The invention also relates to a method of using such secure software modules.