计算机显示系统电磁信息泄漏的检测与分析

发布时间：2018-05-24 00:13

本文选题：显示系统 + 辐射信号　；参考：《太原科技大学》2013年硕士论文

【摘要】：计算机显示系统是由各个分系统、部件构成的，作为数据信息传输和显示的主要系统，电子设备工作时候会有意、无意的向外产生电磁辐射，而这些电磁辐射是这些系统和分部件共同作用的结果。因而本文首先从整体上对计算机显示系统的辐射情况进行分析，然后针对各个部件分别研究了其工作时的数据流向、工作方式，寻找各个分部件可能产生的电磁辐射情况。本文针对计算机显示系统电磁信息泄漏进行检测与分析，并进行了安全性评估分析，最后提出防护对策。主要工作如下：一，通过对计算机显示系统主要部件进行分析研究，掌握计算机显示系统的工作原理、各部件工作时的数据信息流向。二，在分析信息电磁辐射的基础理论和辐射特性的基础上，研究计算机显示系统的主要泄漏途径，进一步找出计算机显示系统中主要的辐射源以及其泄漏的方式，分析其辐射信号的特征。三，选择相关的设备，搭建测试平台。利用天线、探头、频谱仪和示波器等设备，采集计算机显示系统各个部件的辐射信号。通过分析实验数据，得到了显卡和LCD显示器的频谱范畴和辐射强度，对于数据传输线通过信号相似性理论对其是否属于泄漏发射红信号进行了验证。四，结合理论的分析和实际的实验数据，，给出了计算机显示系统电磁信息泄漏的安全性评估，同时提出了几种可行性的信息安全防护对策。
[Abstract]:The computer display system is composed of various sub-systems and components. As the main system for transmitting and displaying data and information, electronic devices work intentionally and inadvertently to generate electromagnetic radiation. These electromagnetic radiation is the result of the interaction of these systems and components. In this paper, the radiation of the computer display system is analyzed firstly, and then the data flow direction and the working mode of each component are studied, and the electromagnetic radiation of each component is found. In this paper, the leakage of electromagnetic information in computer display system is detected and analyzed, and the safety evaluation is carried out. Finally, the countermeasures are put forward. The main tasks are as follows: First, by analyzing and studying the main components of the computer display system, we can master the working principle of the computer display system and the flow of data information when each part works. Second, on the basis of analyzing the basic theory and radiation characteristics of information electromagnetic radiation, the main leakage ways of computer display system are studied, and the main radiation sources in computer display system and their leakage modes are further found out. The characteristics of the radiation signal are analyzed. Third, select the relevant equipment and build the test platform. Using antennas, probes, spectrometers and oscilloscopes, the radiation signals of various parts of the computer display system are collected. The spectrum category and radiation intensity of the display card and LCD display are obtained by analyzing the experimental data. The data transmission line is verified by the theory of signal similarity whether it belongs to the leakage emission red signal. Fourthly, combined with theoretical analysis and experimental data, the safety evaluation of electromagnetic information leakage in computer display system is given, and several feasible countermeasures for information security protection are put forward.
【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP334.1;TP309

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