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Hidden semi-Markov model (HSMM) Maximum entropy principle (MEP) Segmental K-means algorithm a b s t r a c t In this paper, hidden semi-Markov model (HSMM) is introduced into intrusion detection. Hidden Markov model (HMM) has been applied in intrusion detection systems several years, but it has a major weakness: the inherent duration probability density of a state in HMM is exponential, which may be inappropriate for the modeling of audit data of computer systems. We can handle this problem welldoi:10.1016/j.amc.2008.05.028 fatcat:2oijrpiv3jbjznjootafzdgp2y