Trust Model for Open Ubiquitous Agent Systems

  • Authors:
  • Martin Rehak;Lukas Foltyn;Michal Pěchouček;Petr Benda

  • Affiliations:
  • Gerstner Laboratory, Department of Cybernetics and Center for Applied Cybernetics Czech Technical University in Prague, Czech Republic;Gerstner Laboratory, Department of Cybernetics and Center for Applied Cybernetics Czech Technical University in Prague, Czech Republic;Gerstner Laboratory, Department of Cybernetics and Center for Applied Cybernetics Czech Technical University in Prague, Czech Republic;Gerstner Laboratory, Department of Cybernetics and Center for Applied Cybernetics Czech Technical University in Prague, Czech Republic

  • Venue:
  • IAT '05 Proceedings of the IEEE/WIC/ACM International Conference on Intelligent Agent Technology
  • Year:
  • 2005

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Abstract

Trust management model that we present is adapted for ubiquitous devices cooperation, rather than for classic client-supplier relationship. We use fuzzy numbers to represent trust, to capture both the trust value and its uncertainty. The model contains the trust representation part, decisionmaking part and a learning part. In our representation, we define the trusted agents as a type-2 fuzzy set. In a decisionmaking part, we use the methods from the fuzzy rule computation and fuzzy control domain to take trusting decision. For trust learning, we use a strictly iterative approach, well adapted to constrained environments. We verify our model in a multi-agent simulation where the agents in the community learn to identify defecting members and progressively refuse to cooperate with them. Our simulation contains signi ficant background noise to validate model robustness.