Compromising Emanations from VGA and DVI Interface

To evaluate the possibility of information leakage by observing the electromagnetic disturbance radiated from VGA and DVI graphical interface, we propose an evaluation method by using a FSET 22 receiver. IT devices used for classified information display have to minimize the risk of electromagnetic eavesdropping. In those devices the aim is to minimize the level of radiated emissions via radio path, in which there is a high probability of interception by unauthorized persons and reproduction of conveyed information. The article has focused on revealing the possibility of eavesdropping of radiated compromising emanation during image transmission through VGA and DVI graphical interface. For that purpose a comparative analysis of signal occurring directly on transmission line of VGA and DVI graphical port has been made as well as its equivalent received by FSET 22 receiver as radiated emission.