METHOD FOR CONTROLLING THE EXECUTION OF A REQUEST FOR ACTION TRANSMITTED BY A SERVER TO A CHIP CARD VIA A TERMINAL

摘要

The invention concerns a method for exchanging synchronised messages between an application server and at least a chip card, wherein the card transmits a message to the server containing the latest current value of an action counter stored by the server; the server emits a message comprising a request including one or several actions to be implemented by the card and stores the number n of actions of the request; the card receives the message, successively executes the action or actions in the request incrementing its action counter between each action if the action has been successfully executed; when there is a request for a transaction by the card, the server compares the received action counter value with the latest value stored, incremented by the number of actions contained in the previous request for actions and, operates on the basis of this comparison.