网络已经成为了人类所构建的最丰富多彩的虚拟世界,网络的迅速发展,给我们的工作和学习生活带来了巨大的改变。我们通过网络获得信息,共享资源。它不仅从一般性的防卫变成了一种非常普通的防范,而且还从一种专门的领域变成了无处不在。随着网络的延伸,安全问题受到人们越来越多的关注。在网络日益复杂化,多样化的今天,如何保护各类网络和应用的安全,如何保护信息安全,成为了本文探讨的重点。 The Internet has become the most colorful and virtual world built by mankind. The rapid development of the Internet has brought tremendous changes to our work and study life. We get information and share resources through the Internet. Not only has it changed from a general defense to a very ordinary one, it has also evolved from a specialized field to a ubiquitous one. With the extension of the network, more and more attention has been paid on the security issue. How to protect the security of all kinds of networks and applications and how to protect the information security has become the focus of this article.