入侵检测技术从原理上分为异常检测和误用检测，从检测内容上分为主机入侵检测和网络入侵检测技术。
On principle, Intrusion detection technology is made up of abnormal detection and musing detection and by the detected content, it includes host detection and network detection.
其次是对入侵检测算法的讨论和分析，包括各种算法的原理介绍、应用到入侵检测领域的技术细节及各自的优点和不足。
Second, the algorithms of Intrusion Detection, including their principles, technique details applied in Intrusion Detection, their virtues and weakness, are discussed and analyzed.
分析了审计跟踪遇到的问题及基本原理，探讨了基于审计的入侵检测系统的目标及关键技术。
This paper discusses the goal and the key technique about audit-based and intrusion detection system.
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