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Bolzoni, D. and Crispo, B. and Etalle, S. (2008) ATLANTIDES: Automatic Configuration for Alert Verification in Network Intrusion Detection Systems. Technical Report TR-CTIT-08-17, Centre for Telematics and Information Technology University of Twente, Enschede. ISSN 1381-3625
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We present an architecture designed for alert verification (i.e., to reduce false positives) in network intrusion-detection systems. Our technique is based on a systematic (and automatic) anomaly-based analysis of the system output, which provides useful context information regarding the network services. The false positives raised by the NIDS analyzing the incoming traffic (which can be either signature- or anomaly-based) are reduced by correlating them with the output anomalies. We designed our architecture for TCP-based network services which have a client/server architecture (such as HTTP). Benchmarks show a substantial reduction of false positives between 50% and 100%.
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