Computer Science ›› 2019, Vol. 46 ›› Issue (11A): 496-501.

• Information Security • Previous Articles     Next Articles

Method for Unknown Insider Threat Detection with Small Samples

WANG Yi-feng, GUO Yuan-bo, LI Tao, KONG Jing   

  1. (Cryptography Engineering Institute,Information Engineering University,Zhengzhou 450001,China)
  • Online:2019-11-10 Published:2019-11-20

Abstract: Few insider threats are usually covered by a mass of normal data.It is difficult for traditional anomaly detection method based on machine learning to detect insider threats because of lacking in sufficient labeled data.To detect these unknown insider threats with small samples,this paper proposed a method based on prototypical networks witch used Long Short Term Memory networks to extract the features of user behavior data and updated parameters by meta learning.This method uses cosine similarity to classify new class samples which are not seen in training set.The experimental results with generated data based on CMU-CERT dataset finally show that the proposed method is effective,and the classification accuracy of detecting unknown insider threat is 88%.

Key words: Few-lhot learning, Unknown insider threat, Meta learning, Prototypical networks

CLC Number: 

  • TP393
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