Leakage proof apparatus and method of high speed digital video signal

Abstract

The invention relates to an FPGA-based anti-leakage device for high speed digital video signal and the method thereof, and belongs to the computer information security field. The invention is characterized in that the anti-leakage device can prevent video information leakage through the following steps: the anti-leakage device generates a random sequence through a random number generator; the anti-leakage device determines the significant bit of pixel data which determines the video definition in the video pixel sequence; the significant bit of the pixel data for determining the video definition is preserved. The rest of the pixel bits are replaced with the random numbers in the random sequence, to generate scrambled video data at random, and to display the video signal after being scrambled at random, therefore, the anti-leakage device not only ensures the video information to be clearly displayed, but also prevents the video information leakage during the work of the computer display.

Description

technical field [0001] The invention belongs to the field of computer information security, in particular to an FPGA-based high-speed digital video signal leakage prevention device and method. Background technique [0002] Information security is an important guarantee for a country to win in political, economic, military and diplomatic struggles. Practice has made the world's technological and military powers all pay attention to the country's own information security and informationized combat capabilities: in the First World War, the German army successfully used the return current of the battlefield telephone ground wire to eavesdrop on the enemy's military intelligence; An important reason for the failure of the Midway Island naval battle was that its military plan was intercepted and deciphered by the US military through radio waves; during the Gulf War, the United States launched a spy satellite equipped with the most advanced TEMPEST system, which intercepted A larg...

AI Technical Summary

Problems solved by technology

On the other hand, since the working bandwidth of the DVI video signal is much larger than that of the VGA analog signal, the frequency band of video information leakage is usually within the working bandwidth, and filtering out the signal within the working bandwidth will make the digital circuit unable to recognize the logic level normally, so Filtering can no longer be used for leak prevention of digital video information, which requires a new leak prevention method suitable for high-speed digital video signals

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