Active Protection Device for Protecting Circuit Against Mechanical and Electromagnetic Attack

摘要

For protecting a circuit 1 against a mechanical or electromagnetic attack, an active protection device attached to the circuit comprises: at least one generator 13, 14 for generating a magnetic field, at least one magnetic sensor S 1, S 2, S 3, S 4 for measuring a value of the magnetic field, an integrity circuit connected to the at least one magnetic sensor S 1 , S 2 , S 3, S 4 and to the circuit 1. The integrity circuit activates a reaction procedure in the circuit if the measured value of the magnetic field made by the magnetic sensor is out of a values domain, the values domain being correlated to the generated magnetic field.