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0引言计算机网络技术的快速发展,使人们的学习与工作发生了巨大的变化,人们借助于Internet的平台,可以在网上获得信息,学习专业知识、娱乐、购物、看电影等。但现在很多事情都在网上进行交易,网上交易存在不安全性,这些不安全性来自于很多方面,主要有黑客的攻击、计算机病毒的侵入都能获得交易的密码,因此网络安全显得非常重要。现在有很多网络安全防范措施,
0 Introduction The rapid development of computer network technology, people’s learning and work has undergone tremendous changes, people use the Internet platform, online access to information, learning expertise, entertainment, shopping, watching movies. But now a lot of things are traded on the Internet. Online transactions are insecure. The insecurity comes from many aspects. Mainly hacker attacks and intrusion of computer viruses can obtain transaction passwords. Therefore, network security is very important. There are many cyber security precautions now,