In some particularly difficult cases, especially network-related problems, this information often plays a key role in tracking down the source.

在某些非常困难的情况下，特别是与网络相关的问题，这些信息常常在跟踪问题来源的任务中扮演重要的角色。

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With the rapid development and widespread application of Internet, the problems of network information security become more and more serious.

随着互联网络的迅猛发展和广泛应用，网络信息安全问题变得越来越严峻。

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Intrusion Detection System, new domain of Network Security, is a core research area in dynamic Information Security, but it still has many problems, especially in self-completing and self-learning.

入侵检测系统是目前安全领域较新课题，是动态安全领域的核心，但目前仍然存在很多问题，特别是具有自适应能力、能自我学习的入侵检测系统还不完善。

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