0引言随着当今世界计算机普及应用程度的越来越高,互联网也得到了非常广泛的使用,而且对人们的工作生活方式产生了深远的影响。在方便我们日常工作、学习和生活的同时,随之也出现了一些网络安全情况。网络信息的流失和网络入侵问题时有发生,甚至很多军工单位和政府部门的专业网站也经常会遭遇到网络攻击。 0 Introduction With the increasing popularity of computer in today’s world, the Internet has also been very widely used, but also has a profound impact on people’s working life style. While facilitating our daily work, study and life, there have been some cyber-security situations. Network information loss and network intrusion problems have occurred, and even many professional military units and government departments also often encounter cyber attacks.