摘要
在研究PS/2键盘控制模块的时钟与数据信号接口电路结构特征的基础上,利用电路等效的方法研究了键盘电磁泄漏发射与信息还原机理,通过测试实验验证了该方法的有效性;进一步提出了两种电磁泄漏防护方式,具体设计了一种电磁泄漏防护方案。实验测试结果表明,该方案能够有效抑制键盘的电磁发射,防止按键信息通过电磁发射被还原。
This paper studied the circuit structure characteristic of data and clock signal interface in the PS/2 keyboard’s control module.On this basis,it used the method of equivalent circuit to research the electromagnetic compromising emanations and its information recovery mechanism,the effectiveness of which was test and verified by a later measurement experiment.Furthermore,it proposed two different ways of security protection,and designed a shielding protection method against compromising emanations of keyboard.It is demonstrated by the result of the experiment that electromagnetic emission of keyboard is suppressed effectively and good protection effect against keystroke recovery is reached.
出处
《计算机应用研究》
CSCD
北大核心
2012年第7期2708-2711,共4页
Application Research of Computers
关键词
电磁信息泄漏
信息安全
下降沿
安全防护
electromagnetic compromising emanations
information security
falling edge
security protection
