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Intrusion detection is the process of identifying and responding to suspicious activities targeted at computing and communication resources and it has become the mainstream of information assurance as the dramatic increase in the number of attacks. Intrusion Detection System (IDS) monitors and collects data from a target system that should be protected, processes and correlates the gathered information, and initiates responses when evidence of an intrusion is detected. Analyzing the function characteristic of the satellite nodes, this paper builds a security domain based on the login and log-out mechanism, then a lamination distributed intrusion detection model of satellite network is proposed and a cooperation mechanism of intrusion detecting agent on satellite working inside and between the security domains is designed.
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