随着计算机网络在人类生活领域中的广泛应用,针对重要信息资源和网络基础设施的入侵行为和企图入侵行为的数量仍在持续不断增加,网络攻击对生活造成了极大的威胁。计算机病毒不断地通过网络产生和传播,计算机网络被不断地非法入侵,重要情报、资料被窃取,甚至造成网络系统的瘫痪等等,因此计算机网络安全面临着各种挑战与威胁。 With the widespread application of computer networks in the field of human life, the number of intrusion and attempted invasion of important information resources and network infrastructures continues to increase, posing a tremendous threat to life. Computer viruses are continuously generated and spread through the Internet, computer networks are continuously invaded by intrusion, important intelligence and information are stolen, and even network systems are paralyzed. Therefore, computer network security faces various challenges and threats.