Etat Francais Represente Par Le Delegue General Pour L'armement

Thales

Sébastien Mallier

Erwan Nogues

Philippe Viravau

Thierry Dandois

Daniel Bigot

Nogues Erwan

Dandois Thierry

François Sirven

Disclosed is a method for detecting at least one compromised computer device in an information system, the method including: performing a frequency scan involving dividing the electromagnetic spectrum into frequency sub-bands; performing, in each frequency sub-band, a time envelope demodulation in order to recover signals transmitted by at least one computer device of the information system; converting each demodulated signal in the frequency domain; constructing a frequency spectrum on the basis of the demodulated signals in all the frequency sub-bands; finding, in each frequency sub-band of the frequency spectrum, at least one amplitude line having energy that is greater than a first predefined energy threshold; and, if at least one line having energy that is greater than the first predefined energy threshold is found, indicating the presence of at least one compromised computer device transmitting compromising spurious signals.

Method for detecting at least one compromised computer device in an information system

Growing community of inventors

Bourg des Comptes, France

Sébastien Mallier