Abstract: The trust relationship model is one of the most complex social relation models either in real life or in the open networks.It is an abstract cognitive psychology with difficult measure,because it involves assumptions,expectations,behavior and environment,and other factors.Drawing on previous research experience,considering the variety of trust factor,this paper proposed a new trust fusion model for decision-making.This model is based on the evolution of direct trust,indirect trust and reputation,and is on the basis of trust fusion to obtain the decision trust.In order to prove the validity of the trust fusion model,we assumed object makes class A activity in the expectations of the probability P.Experimental verification shows that the difference of decision trust and credibility of the object is significantly less than the difference of decision trust,indirect trust or reputation and credibility of the object.

Key words: Trust management,Trust model