计算机电磁辐射信息再现分析

Analysis of Information Recovery from EM Leakage of Computers

为了将成熟的通信技术应用于计算机电磁辐射信息安全(TEMPEST)研究,对比分析了通信系统模型与电磁辐射信息传播的通用模型的异同;根据通信系统的思想分析了计算机视频信息的编码与调制方式;给出了计算机视频信息的译码与还原方法,并实现了视频信息的还原;建立了视频信息辐射泄漏、接收、解调和译码整个过程的等效通信系统模型.结果表明,通信技术能有效应用于信息再现.

Based on the proven communications technology,the transmitted electromagnetic pulse/energy standards and testing（TEMPEST） is studied.The propagation model of computer information leakage is compared with conventional communication system model.Then coding and modulation of computer video information is analyzed,and the recovery method is given.Finally,an equivalent communication system model of computer video information leakage,reception,demodulation and decoding is established,indicating that the communication technology is effective in transmitted electromagnetic pulse/energy standards and testing study.