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Community-based trust mechanism in P2P social networks

Malicious behaviors is always the problem to solve in P2P social networks. Building the trust model is effective method. In this paper a community-based trust mechanism is presented in the semantic-based P2P Social Networks. The ordinary peers form a community based on similar semantic and intra-community reputation of peers is calculated. The super peers constitute the structured P2P network and intercommunity reputation is evaluated. This mechanism combines the local trust and the global trust. The experiments show that this trust mechanism can be effective in reducing effects caused by a variety of malicious behavior.