在信息化社会中,利用计算机技术进行信息的采集、加工、存储、传输、检索的计算机信息系统成为信息处理的重要工具。人们利用计算机越来越普遍,依赖程度也越来越高。但是,由于计算机信息系统存储了大量涉及国家、集体和个人利益的信息,是宝贵的财富,因此也成为一些国家和组织以及一些别有用心者威胁、攻击、破坏的主要对象。计算机信息系统安全问题越来越受到人们的广泛关注。 In the information society, the computer information system that uses computer technology to collect, process, store, transmit and retrieve information has become an important tool for information processing. People use computers more and more common, more and more dependent on the degree. However, since computer information systems store a great deal of information concerning the interests of nations, communities and individuals, they are valuable assets and therefore become the main targets of threats, assaults and sabotages by some countries and organizations as well as some ulterior motives. Computer information system security issues more and more people’s attention.