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IDES: The Enhanced Prototype
 by Dr. Peter Neumann, Alfonso Valdes, Teresa F. Lunt, R. Jagannathan, Rosanna Lee, Sherry Listgarten, David L. Edwards & Harold S. Javitz.


This report describes the design and implementation of a real-time intrusion detection expert system (IDES) designed and developed by SRI International. IDES is an independent system that monitors the activities of different types of subjects, such as users and remote hosts, of a target system to detect security violations by both insiders and outsiders as they occur. IDES adaptively learns subjects' behavior patterns over time and detects behavior that deviates from these patterns. IDES also has an expert system component that can be used to encode information about known system vulnerabilities and intrusion scenarios.

This work was supported by the U.S. Navy, SPAWAR, which funded SRI through subcontract 9-X5H-4074J-1 with the Los Alamos National Laboratory.



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