DynamicTrust: three-dimensional dynamic computing model of trust in peer-to-peer networks

  • Authors:
  • Fengming Liu;Wenyin Zhang;Yongsheng Ding;Xiyu Liu;Mingchun Zheng;Yu Liu

  • Affiliations:
  • School of Management and Economics, Shandong Normal University, Jinan, China;Information School, Linyi Normal University, linyi, China;College of Information Sciences and Technology, Donghua University, shanghai, China;School of Management and Economics, Shandong Normal University, Jinan, China;School of Management and Economics, Shandong Normal University, Jinan, China;Department of commerce, Jinan Technology college, Jinan, China

  • Venue:
  • Proceedings of the first ACM/SIGEVO Summit on Genetic and Evolutionary Computation
  • Year:
  • 2009

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Abstract

With the application of peer-to-peer network, how to promote cooperation between peers has gotten more and more important. Most of traditional security technologies can not be applied in P2P network very well to promote the cooperation because of the special characteristics of P2P network such as openness and anonymity, etc. Trust has been proven to be essential to enforcing cooperative behavior in peer-to-peer networks. Trust relationship depends on trustee's trustworthiness. So, in this paper, we present a three-dimensional computing model of dynamic trust to try to find a way to address the problem. Firstly, we give a three-dimensional computing model of trust and make a dynamics analysis to trust of peer. Next, considered the new peer without trustworthiness can not do anything almost, we propose an algorithm of initial trustworthiness based on the new peer's abilities. To compute the direct trustworthiness and the recommended trustworthiness, we colligate the time as a dynamic factor. Finally, based on the trustworthiness computed by trust fusion algorithm, we present a mechanism of making trust decision to promote cooperation. The simulation results have showed that our model can enhance the cooperation between peers and avoid the malicious peers from destroying behaviors.