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Intrusion Detection Systems (IDSs) were introduced by Anderson and formalized later by Denning. Nowadays, there exist two main types of network intrusion detection methods: anomaly-based and signature-based. In signature-based methods, a characteristic trait of the intrusion is developed off-line, and then loaded in the intrusion database before the system can begin to detect this particular intrusion. This paper presents POSEIDON, a new anomaly-based network intrusion detection system. POSEIDON is payload-based, and has two-tier architecture the first stage consists of a Self-Organizing Map, while the second one is a modified PAYL system.

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Format:PDFSize:359 KB
Date:Apr 2006
Pages:10

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