Intrusion Detection Method based on Frequent Pattern

As the surging development of the information technology, Intrusion Detection System has been devised for the safety of computer network. This paper focuses on the method of frequent pattern based intrusion detection. A new formula measuring the normal degree of a transaction is presented. We propose a new algorithm to calculate each transaction's normal degree as well as detect intrusions. Experiment results show that the proposed algorithm is competent in detecting intrusions with high detection rate and relatively low false positive rate.