保证计算机网络的安全,保证网络上数据的完整性等问题越来越受到人们的高度重视。人们的生活越来越依赖于网络及其存储的信息,网络为人们提供了机会和方便的同时,也带来了一些新的问题。另 To ensure the safety of computer networks to ensure the integrity of the data on the network and other issues more and more people attach great importance. People’s lives depend more and more on the network and the information they store. The Internet provides people with opportunities and conveniences as well as new problems. another