Intrusion detection by machine learning: A review

Chih Fong Tsai, Yu Feng Hsu, Chia Ying Lin, Wei Yang Lin

Research output: Contribution to journalReview articlepeer-review

715 Scopus citations


The popularity of using Internet contains some risks of network attacks. Intrusion detection is one major research problem in network security, whose aim is to identify unusual access or attacks to secure internal networks. In literature, intrusion detection systems have been approached by various machine learning techniques. However, there is no a review paper to examine and understand the current status of using machine learning techniques to solve the intrusion detection problems. This chapter reviews 55 related studies in the period between 2000 and 2007 focusing on developing single, hybrid, and ensemble classifiers. Related studies are compared by their classifier design, datasets used, and other experimental setups. Current achievements and limitations in developing intrusion detection systems by machine learning are present and discussed. A number of future research directions are also provided.

Original languageEnglish
Pages (from-to)11994-12000
Number of pages7
JournalExpert Systems with Applications
Issue number10
StatePublished - Dec 2009


  • Ensemble classifiers
  • Hybrid classifiers
  • Intrusion detection
  • Machine learning


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