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Model Generalization and Its Implications on Intrusion Detection

  • Zhuowei Li
  • Amitabha Das
  • Jianying Zhou
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3531)

Abstract

To make up for the incompleteness of the known behaviors of a computing resource, model generalization is utilized to infer more behaviors in the behavior model besides the known behaviors. In principle, model generalization can improve the detection rate but may also degrade the detection performance. Therefore, the relation between model generalization and detection performance is critical for intrusion detection. However, most of past research only evaluates the overall efficiency of an intrusion detection technique via detection rate and false alarm/positive rate, rather than the usefulness of model generalization for intrusion detection. In this paper, we try to do such evaluation, and then to find the implications of model generalization on intrusion detection. Within our proposed methodology, model generalization can be achieved in three levels. In this paper, we evaluate the first level model generalization. The experimental results show that the first level model generalization is useful mostly to enhance the detection performance of intrusion detection. However, its implications for intrusion detection are different with respect to different detection techniques. Our studies show that in general, though it is useful to generalize the normal behavior model so that more normal behaviors can be identified as such, the same is not advisable for the intrusive behavior model. Therefore, the intrusion signatures should be built compactly without first level generalization.

Keywords

Security Machine Learning Intrusion Detection Generalization Intrusion Security Infrastructure 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Zhuowei Li
    • 1
    • 2
  • Amitabha Das
    • 1
  • Jianying Zhou
    • 2
  1. 1.School of Computer EngineeringNanyang Technological UniversitySingapore
  2. 2.Institute for Infocomm ResearchSingapore

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