METHOD FOR MAKING SECURE ACCESS TO A RESIDENT APPLICATION ON A USER CARD CO-OPERATING WITH A COMMUNICATION SYSTEM TERMINAL, AND CORRESPONDING TERMINAL

摘要

The invention concerns a method for making secure the access of an external application to at least a microprocessor user card, said user card being capable of containing several internal applications, said external application corresponding to one of the internal applications, said user card co-operating with a terminal, said external application using a connection protocol to the user card wherein, with each external application is associated a predetermined identification parameter. Said method comprises the following steps: when a first external application is connected to the corresponding internal application on said user card, determining the application identification parameter; if a second external application requires connection to said user card, analysing the parameter identification of said second application; if said parameter is identical to that of the first connected application, prohibiting access for the second external application to said corresponding internal application on the user card.