计算机的广泛应用把人类带入了一个全新的时代,随着计算机网络技术和通信技术的快速发展,现已进入了计算机网络时代,网络已经渗透到了人们的生活,人们在享受着网络带来的无尽的丰富资源的同时,也面临着越来危险和复杂的网络的安全危险及难以回避的危险,网络信息的安全和保密已成为一个很关键且急待解决的问题。 With the rapid development of computer network technology and communication technology, computer has been brought into a brand-new era. Nowadays, computer has entered the era of computer network, the network has infiltrated the people’s life, people are enjoying the network brought Endless rich resources, but also face the more dangerous and complex network security danger and the unavoidable danger. The security and confidentiality of network information has become a key and urgent problem.