A clustering-based method for unsupervised intrusion detections

  • Authors:
  • ShengYi Jiang;Xiaoyu Song;Hui Wang;Jian-Jun Han;Qing-Hua Li

  • Affiliations:
  • School of Informatics, GuangDong University of Foreign Studies, 510420 Guangzhou, Guangdong, China;Electrical and Computer Engineering, Portland State University, Oregon, OR, USA;Communication Command College, 430010 Wuhan, Hubei, China;Computer School, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China;Computer School, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China

  • Venue:
  • Pattern Recognition Letters
  • Year:
  • 2006

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Abstract

Detection of intrusion attacks is an important issue in network security. This paper considers the outlier factor of clusters for measuring the deviation degree of a cluster. A novel method is proposed to compute the cluster radius threshold. The data classification is performed by an improved nearest neighbor (INN) method. A powerful clustering-based method is presented for the unsupervised intrusion detection (CBUID). The time complexity of CBUID is linear with the size of dataset and the number of attributes. The experiments demonstrate that our method outperforms the existing methods in terms of accuracy and detecting unknown intrusions.