Preliminary communication

https://doi.org/10.17559/TV-20150314122306

Making reputation system traceable without losing privacy

Keli Zhang ; Information Security Center, Beijing University of Posts and Telecommunications, No 10, Xitucheng Road, Haidian District, 100876 Beijing, P. R. China
Yi Xian Yang ; Information Security Center, Beijing University of Posts and Telecommunications, No 10, Xitucheng Road, Haidian District, 100876 Beijing, P. R. China

Abstract

In existing reputation system nodes usually adopt regular pseudonyms instead of true identities to gain the anonymity. However complete anonymity will cause watershed and Sybil attack, which look on system be out of control and break the fairness of the reputation system. This paper introduces the conditional anonymity mechanism to check the evaluation between anonymity nodes, evaluation between two nodes if not more than the several times, but not be evaluated between two pseudonyms belong to the same peer. It will be effective, otherwise, the node true identity will be exposed, if number of attacks of the peer within the time exceeds d times, nodes in the evaluation and transaction will be tracked. Analysis shows that this mechanism cannot only protect the identity of peer's anonymity, but identify and track malicious attackers.

Keywords

conditional anonymity; privacy; pseudonym; reputation system; traceable

Hrčak ID:

160154

URI

https://hrcak.srce.hr/160154

Publication date:

19.6.2016.

Article data in other languages: croatian

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