Abstract
Sybil attack is one of the major threats in distributed systems. A number of colluded Sybil peers can pollute and disrupt the system’s key functions. The main idea of defense against Sybil attack is to distinguish the Sybils according to specific rules. Prior works are all limited by attack edges, the connections between normal and Sybil peers. The problem is that the number of attack edges could be huge, resulting in low accuracies. Besides, Sybil peers always present in groups and bring about the bridge problem, which is always ignored. In this paper, we propose KFOut, a light weighted framework for Sybil detection. At the heart of KFOut lie a trust model of social relations and a security mechanism of path notification of K-different paths, which can conquer the bridge problem effectively. We prove through experiments that KFOut can accept normal peers and reject Sybil peers both with high accuracies.
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This work is supported by the National Natural Science Foundation of China under Grant No. 61170285 and Grant No.61379103.
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© 2015 Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
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Chen, K., Zhu, P., Xiong, Y. (2015). Keep the Fakes Out: Defending Against Sybil Attack in P2P Systems. In: Tian, J., Jing, J., Srivatsa, M. (eds) International Conference on Security and Privacy in Communication Networks. SecureComm 2014. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 152. Springer, Cham. https://doi.org/10.1007/978-3-319-23829-6_14
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DOI: https://doi.org/10.1007/978-3-319-23829-6_14
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