Correlation-based Detection of LDoS Attack

摘要

Low-rate Denial of Service (LDoS) attack and TCP flows are simulated in the time and frequency domain for the purpose of analyzing their signatures and extracting period T and duration L of LDoS attack, which are two correlative parameters used in the proposed detecting approach. In the correlation operation, the reference signal is the simulated traffic of LDoS attack, which are built based on the extracted parameters of T and L. The incoming signal is the hybrid signal (TCP flows plus Real LDoS attacks). A detect threshold is established to be compared with the results of correlation operation. If the correlation value exceeds the threshold, the LDoS attack is determined. The proposed method has been tested both in network simulation NS-2 platform and network testbed environment with different parameters of T and L. Experimental results show that the proposed approach reaches the good performance with higher detect rate P_D , and lower false negative alarm rate P_(FN) and false positive alarm rate P_(FP).