一种基于硬件的U盘隔离方法的设计与实现

Design and Implementation of A Hardware-based U Disk Isolation Method

U盘的普及使U盘病毒繁衍迅速,针对信息系统安全保护的需要,设计出一种U盘病毒隔离器。该隔离器具有隔离Autorun病毒、防止PC的数据通过U盘泄密、防止PC中的病毒感染U盘的功能。隔离器能够快速捕获到U盘与主机之间所有底层数据,在此基础上,隔离器中的微控制器（MCU）通过分析、审计和过滤流过隔离器中的底层数据来实现上述功能。经实际检测,该设计能够实现预定功能。

With the popularity of U disk,the vineses of U disk spread rapiclly.A virus isolator is designed for the need of information system security.The isolators have the functions such as isolating Autorun virus,preventing leakage of PC＇s data through U disk and preventing PC＇s viruses infection on U disk.The aboved functions are achieved by the following ways： the isolators can quickly capture all the underlying data between U disk and hosts,and on this basis,the microcontroller（MCU） in the isolators analyzes,audits and filters these underlying data flowing through the isolators.And the actual test shows that,the design in the paper achieves the intended functions.