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Anonymous circuit control method for the onion router based on node failure
ZHUO Zhongliu, ZHANG Xiaosong, LI Ruixing, CHEN Ting, ZHANG Jingzhong
Journal of Computer Applications    2015, 35 (10): 2843-2847.   DOI: 10.11772/j.issn.1001-9081.2015.10.2843
Abstract698)      PDF (786KB)(526)       Save
Focusing on the issue that the communication path selected by random routing algorithm of the onion router (Tor) can not be controlled, thus leading to problems such as the abuse of anonymous techniques and the failure of tracing methods, a Tor anonymous circuit control method based on node failure was proposed. To effectively control the circuit, the fake TCP reset information was sent to mimic the node failure, so that the Tor client would not stop choosing nodes until it selected the controlled ones. The results of theoretic analysis of Tor network path selection algorithm and the real test in a private Tor network composed of 256 onion routers demonstrate the effectiveness of the proposed approach. Compared with traditional methods which deploy high bandwidth routers to attract users to select the controlled nodes, the proposed method can improve the probability of choosing controlled entry node from 4.8% to about 60%, when entry guard was generally enabled by Tor client by default. The results also show, as the length of a controlled path increases, the success rate of building path decreases. Therefore the proposed method is suitable for controlling short paths.
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