Abstract:

Trust provides guarantee for quality of service. In e-commerce environment,factors such as complexity,fuzziness and uncertainty can’t ensure consumer payment.It is urgent to judge service providers’credibility and ability to provide services. In this paper,taking the ecommerce environment as the research background,by use of intuitionistic fuzzy (IF) theory,we propose a trust evaluation approach of multidimensional feedback IF information.This trust evaluation approach can implement conversions between feedback attributes and IF sets.We obtain the weight of the attributes via entropy for intuitionistic fuzzy sets,and then aggregate the IF information corresponding to each entity through intuitionistic weighted arithmetic averaging operators,which comprehensively,objectively,and delicately reflects the fuzziness and uncertainty of the trust.Examples and simulation results show the feasibility of the trust evaluation approach.A sensitivity analysis for risk appetites shows that different risk appetites of service requestors will lead to different trust scores of service providers under estimation. It is also verified that the proposed approach can effectively inhibit attacks from malicious nodes, and it may provide a new way for research on trust evaluation in ecommence environment.

Key words: intutionistic fuzzy (IF);trust evaluation;feedback attribute;risk appetite;trust score