Shielding effectiveness required for IT equipment enclosures

Information technology (IT) devices used for classified information processing 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 the shielding effectiveness (A
_s
) value calculation for IT equipment enclosure. The calculated A
_s
minimize the risk of electromagnetic eavesdropping. For calculation of emission-security shielding effectiveness for IT devices as the measure of an eavesdropper signal quality was used signal-to-noise ratio S/N available at the input of infiltration receiver.