Distributed intrusion detection systems

[alakhno () gmail com]

 Hello!
I'm looking for the examples of distributed intrusion detection systems. Here I mean intrusion detection systems, those 
collect network data from multiple agents and analyze it using one expert system.

I'm especially interested in concrete examples of successful intrusion detections those highlight benefits of 
distributed IDS in comparison with multiple usual intrusion detection systems installed.

Besides I'm looking for articles on distributed intrusion detection systems. Detection of traffic flows correlations, 
network graph models, graph metrics and network flows statistics are particularly interesting as used here.

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