On the evaluation of electromagnetic information leakage from mobile device screens

We present a statistical testing based methodology for evaluating electromagnetic radiation from a tested mobile device that potentially contains exploitable information for re-constructing screen images of the device. The basic idea is to employ a statistical test instead of reconstructing screen images. The validity of our methodology is demonstrated in a real-world setting by an experiment observing EM radiation from a tablet device's screen that would be usable in a TEMPEST attack.