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计算机电磁信息泄漏是信息安全的一个隐患。文章设计了无线接收计算机设备电磁辐射信号的系统,针对泄漏信息中包含复杂干扰信号的问题,利用小波分析对接收到的显示器电磁泄漏信息进行滤波和除噪处理。实验结果证明:小波能够很好的改善还原效果。
Computer electromagnetic leakage of information is a hidden danger of information security. In this paper, a system of wirelessly receiving electromagnetic radiation signals from computer equipment is designed. According to the problem that the leakage information contains complicated interference signals, the received electromagnetic leakage information of the display is filtered and denoised by using wavelet analysis. Experimental results show that wavelet can improve the reduction effect.