ar X iv : c s / 05 11 04 3 v 1 [ cs . C R ] 1 1 N ov 2 00 5 Poseidon : a 2 - tier Anomaly - based Intrusion Detection System ∗

ar X iv : c s / 05 11 04 3 v 2 [ cs . C R ] 7 D ec 2 00 5 Poseidon : a 2 - tier Anomaly - based Network Intrusion Detection System ∗

We present Poseidon, a new anomaly based network intrusion detection system. Poseidon is payload-based, and has a two-tier architecture: the first stage consists of a Self-Organizing Map, while the second one is a modified PAYL system [30]. Our benchmarks on the 1999 DARPA data set [22] show a higher detection rate and lower number of false positives than PAYL and PHAD.

ar X iv : c s / 05 11 04 3 v 3 [ cs . C R ] 3 0 Ja n 20 06 Poseidon : a 2 - tier Anomaly - based Network Intrusion Detection System ∗

We present Poseidon, a new anomaly based network intrusion detection system. Poseidon is payload-based, and has a two-tier architecture: the first stage consists of a Self-Organizing Map, while the second one is a modified PAYL system [32]. Our benchmarks on the 1999 DARPA data set [23] show a higher detection rate and lower number of false positives than PAYL and PHAD.

ar X iv : c s / 05 11 02 3 v 2 [ cs . L O ] 5 N ov 2 00 5 Verifying nondeterministic probabilistic channel systems against ω - regular linear - time properties

ar X iv : h ep - p h / 00 11 11 7 v 1 8 N ov 2 00 0 1 ( Mis ) Understanding the Atmospheric Neutrino Anomaly

ar X iv : h ep - t h / 05 11 16 1 v 1 1 6 N ov 2 00 5 The Effective Potential in the Massive φ 4 4 Model