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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。
This paper analyzes the actual waveform and its frequency distribution of the digital circuit output of the main part of the PC caused by electromagnetic radiation caused by PC electromagnetic radiation and obtains the approximate spectrum distribution of the output signals of these digital circuits. This can be further analyzed digital electromagnetic emission of electronic equipment and information leakage mechanism. This is a reference for preventing information leakage and revealing the method of intercepting information.