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Covariance-Matrix Modeling and Detecting Various Flooding Attacks

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3 Author(s)
Yeung, D.S. ; Dept. of Comput., Hong Kong Polytech. Univ., Kowloon ; Shuyuan Jin ; Xizhao Wang

This paper presents a covariance-matrix modeling and detection approach to detecting various flooding attacks. Based on the investigation of correlativity changes of monitored network features during flooding attacks, this paper employs statistical covariance matrices to build a norm profile of normal activities in information systems and directly utilizes the changes of covariance matrices to detect various flooding attacks. The classification boundary is constrained by a threshold matrix, where each element evaluates the degree to which an observed covariance matrix is different from the norm profile in terms of the changes of correlation between the monitored network features represented by this element. Based on Chebyshev inequality theory, we give a practical (heuristic) approach to determining the threshold matrix. Furthermore, the result matrix obtained in the detection serves as the second-order features to characterize the detected flooding attack. The performance of the approach is examined by detecting Neptune and Smurf attacks-two common distributed Denial-of-Service flooding attacks. The evaluation results show that the detection approach can accurately differentiate the flooding attacks from the normal traffic. Moreover, we demonstrate that the system extracts a stable set of the second-order features for these two flooding attacks

Published in:

Systems, Man and Cybernetics, Part A: Systems and Humans, IEEE Transactions on  (Volume:37 ,  Issue: 2 )