2001年尼姆达病毒的大规模爆发和破坏性结果,促使信息安全问题得到广泛的关注并被纳入信息化日常管理的范畴。日趋严重的计算机病毒和网络攻击行为,使得防病毒软件、防火墙和入侵检测设备得到广泛的部署和应用;大量黑客软件的出现和滥用导致密码的泄露和保密信息的窃取,为此出现了网络行为审计系统。 The large-scale outbreak and devastating results of the Nimda virus in 2001 caused the issue of information security to attract widespread attention and were incorporated into the daily management of informationization. Increasingly, computer viruses and cyber attacks make a wide range of deployment and application of antivirus software, firewalls and intrusion detection devices. The emergence and abuse of a large number of hacker softwares result in the disclosure of passwords and theft of confidential information. As a result, network behaviors Audit system.