Modeling of Leaked Digital Video Signal and Information Recovery Rate as a Function of SNR


Substantial information leakage at PC monitors and TV systems arises in the form of unintentional emissions of high-speed digital video signals, like DVI/HDMI. The information recovery rate from the emanated video signal varies depending on the SNR of the receiver system, that is placed a certain distance away. In this study, a situation in which the signal from a digital video system is intercepted is modeled using full-wave electromagnetic and circuit simulations. For a quantitative analysis of the eavesdropping threat of display systems and also the impact of its countermeasure, the readability of characters on a hypothetical screen as a perform of the BER of the recovery signals is presented. It's clear that a decrease of the SNR of the received signal causes a deterioration of the digital video signal-recovery rate and consequently degrades the legibility of the characters on the intercepted screen. It's expected that these techniques will be helpful for measurements and analyses of the results of countermeasures, like noise jamming or signal modulation, to prevent interceptions of digital video info.

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