Design Of Computer Video Leaking Information Interception System

On the basis of indepth research on interception mechanism of computer videoleaking information, the paper has improved the traditional video leaking informationinterception system and proposed an interception technology based on software radio.This technology moves the step of digitally processing of leaking information tointermediate frequency (IF). At IF, the leaking information is processed digitally tooutput video base band signal using technologies including digital downconversion,digitally highlyeffective filtering, multirate signal processing and digital demodulation .In this way the original information can be reconstructed. For this method, digitallyprocessing begins at IF instead of base band, so signal processing is better done and thetechnical indexes are enhanced to a great extent. Adopting the design concept ofsoftware radio, the interception system has many advantages of the software radiosystem and is excellent in flexibility and openness. So it is very easy for the interceptionsystem to expand functions. By adding corresponding software modules, the system canaccomplish analysis, processing and reconstruction of video base band signal. In thissense, the design of the interception system in this paper is focusing more on thebuilding of the electromagnetic leaking information receiving and analyzing platform.