计算机信息泄漏的机理分析

Principle analysis of computer imformation leakage

此文着重分析了PC机电磁辐射引起信息泄漏的主要部件即PC机显示卡输出口数字电路输出的实际波形及其频谱分布,得到了这些数字电路输出信号的近似频谱分布规律。由此可以进一步分析数字式电子设备电磁辐射与信息泄漏的机理。这对于防范信息泄漏与揭示截收信息的方法均有参考意义。

The practical output waveform and its spectrum distribution of digital circuits of the PC display card output port are analyzed. The circuits are the main parts of computer electromag- netic radiation and information leakage. The approximate spectrum distribution law has been obtained, which is of significance to protecting information from leakage and studying the method of intercepting display information of computers.