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Analysis and Processing of Computer Video Electromagnetic Leaking Signal

Author: LiuShuQuan
Tutor: LiuTaiKang；JiangYun
School: Taiyuan University of Science and Technology
Course: Applied Computer Technology
Keywords: TEMPEST Video electromagnetic information leakage CRT Wavelet Analysis
CLC: TP309
Type: Master's thesis
Year: 2008
Downloads: 100
Quote: 4
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Abstract


With the rapid development of information technology , the computer has been widely used in various industries , currently the most widely used in information processing and information transmission equipment . These information processing equipment to handle classified information in the commercial , military , government , the inevitable will leak out electromagnetic radiation stolen recipient this information can be received within a certain range and reconstruction , resulting in the leak of the information . CRT display device radiation is strongest in the computer system , visually the most informative , most easily intercepted and reproducing video equipment . For CRT monitors , from the structure of the computer CRT monitors , works and produce electromagnetic radiation causes analysis , computer video information leakage radiation mechanism , radiation model and information leakage signal characteristics , pointed out that the video Electromagnetic leak information intercepted theoretical basis . Domain and frequency domain analysis on the basis of radiation CRT electromagnetic information , analysis and processing technology , focused on the video leakage of electromagnetic signals intercepted to set up the video leakage signal analysis and processing system hardware and software combination . Respectively high precision storage device for the collection of black and white squares , as well as multiple characters electromagnetic leakage signal using Fourier and wavelet analysis as a tool of the collected data analysis and processing and noise filtering software , and both analysis results do a comparative analysis. Finally , using the extracted the synchronization feature information on the part of the leak of the video information to restore attempts . This paper implements the analysis of the video leakage signal , and the leakage signal noise filtering pretreatment , for TEMPEST protection with receiving reduction technology , laid the foundation for the design and development of computer TEMPEST products .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality
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