Commissariat a L'energie Atomique Et Aux Energies

Jean-Philippe Michel

Thibaut Sohier

Stéphan Borel

A method is provided for detecting an attack by electromagnetic waves on an electronic chip or system-in-package type device including an attack detection element comprising a GMI-effect electrically-conductive material. The method includes demagnetising the GMI-effect material such that the value of its remanent magnetisation is equal to a predefined value lower than the value of its maximum remanent magnetisation. The method further includes determining a first value of the impedance of the attack detection element, and then after a time period during which the device might have undergone an attack, measuring a second value of the impedance of the attack detection element by circulating in the GMI-effect electrically-conductive material an alternating current with the same frequency as when determining the first impedance value. The method also includes comparing the first and second values of the impedance of the attack detection element.

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Grenoble, France

Jean-Philippe Michel