0引言迈入新世纪,计算机技术迅速普及,人类的生活与互联网联系日益紧密,互联网、计算机已成为生活工作的一部分。人类对网络的依赖度明显增加,与此同时计算机网络面临越来越多的安全威胁,计算机病毒、木马、黑客攻击、信息入侵等都威胁信息安全,近年来网络安全事件频发,其中部分事件造成了较大的社会影响,如棱镜门、好莱坞××门等,给谷歌、苹果等网络巨头企业带来的十分深远的负面影响[1]。保障网络安全已成为网络领域 0 Introduction In the new century, with the rapid popularization of computer technology and the close connection between human life and the Internet, the Internet and computers have become part of the daily life. At the same time, computer networks are facing more and more security threats. Computer viruses, Trojans, hacker attacks and information intrusion are all threats to information security. In recent years, cyber security incidents have been frequent. Some of these incidents Resulting in a greater social impact, such as Prism Gate, Hollywood × × door, to Google, Apple and other online giants enterprises have brought far-reaching negative impact [1]. Ensuring network security has become a network area