近日来,美国雅虎,CNN,电子港湾等一些著名网站受到黑客恶意攻击,网络服务一时陷于瘫痪。给各公司造成了巨大的经济损失。而作为中国的门户网站新浪网,在美国众多网站受到黑客攻击的同时,也遭到了同样的袭击。一时之间,网络安全问题引人瞩目。其实,随着因特网的发展,网络安全问题就一直存在着,由于计算机网络系统组成层次复杂,使用多种不同的协议,存在着不少弱点,因此使得黑客乘虚而入。目前,利用计算机在网络上进行欺诈、破坏、传播不良信息,信用卡盗窃等种种犯罪活动正在逐年增多,这已成为各国政府当前迫切需要解决的问题。 In recent days, some well-known websites such as Yahoo, CNN, and Electronic Harbor have been maliciously attacked by hackers, and their network services have been paralyzed temporarily. To each company caused huge economic losses. As China’s gateway to Sina.com, many websites in the United States have been attacked by hackers as well as the same attacks. For a time, the issue of cybersecurity has drawn much attention. In fact, with the development of the Internet, the problem of network security has always existed. Due to the complex composition of computer network systems and the use of many different protocols, there are many weaknesses that make hackers take advantage of. At present, the criminal activities of using computers to cheat, vandalize, disseminate bad information and credit card theft on the Internet are increasing year by year, which has become a pressing issue urgently required by governments of various countries.