• Intrusion Detection Exchange Format (idwg)
• The IDMEF RFC (0.7)
• Michael Sobirey's collection of links and bibliography about intrusion detection systems.
• Intrusion detection at the SRI's Computer Security Lab where the EMERALD system is developed.
• Intrusion detection at the MIT Lincoln Lab, Information Systems Technology Group.
• Intrusion detection projects at the computer Security Lab ofUC Davis.
• Secure & Reliable Systems Lab at SUNY Stony Brook.
• Snort, a free, lightweight, network-based intrusion detection system.

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