The history status and key technologies ofIDS is reviewed, then the future trends in the development of IDS technologies is discussed, and the history status of Intrusion Detection System is reviewed.
Intrusion Detection is a new security technology, apart from traditional security protect technology, such as firewall and data crypt. Intrusion Detection System is an activitybased network security system. As the logical supplement of usual passive policy, it is animportant part of whole security system. In this paper, the history status and key technologies of IDS is reviewed, then the future trends in the development of IDS technologies is discussed.