An Intrusion Detection System Based on Hierarchical Self-Organization

An intrusion detection system (IDS) monitors the IP packets flowing over the network to capture intrusions or anomalies. One of the techniques used for anomaly detection is building statistical models using metrics derived from observation of the user's actions. A neural network model based on self organization is proposed for detecting intrusions. The selforganizing map (SOM) has shown to be successful for the analysis of high-dimensional input data as in data mining applications such as network security. The proposed growing hierarchical SOM (GHSOM) addresses the limitations of the SOM related to the static architecture of this model. The GHSOM is an artificial neural network model with hierarchical architecture composed of independent growing SOMs. Randomly selected subsets that contain both attacks and normal records from the KDD Cup 1999 benchmark are used for training the proposed