METHOD FOR PROTECTING A CHIP CARD AGAINST A PHYSICAL ATTACK INTENDED TO MODIFY THE LOGICAL BEHAVIOUR OF A FUNCTIONAL PROGRAM

摘要

The present invention relates to a method for protecting a functional program stored in a memory area of an electronic card against an attack by disturbance of electrical origin intended to modify at least one logic state of at least one code of this program, said method comprising: - a step (1) of storing in the course of which codes of the functional program and codes of a control program intended to verify the logical behaviour of the functional program are stored within the memory of the card, - a step (2) of executing at least one code of the functional program, followed by - a step (3) of verifying the logic states of the functional program by executing the control program. The method is characterized in that in the course of the storing step, the codes of the control program are stored in a memory area formed of addresses which are defined so that the attack by disturbance of electrical origin has no influence on the logic states of this program.