A Trust Model Based on Behaviors Risk Evaluation

Trust is an essential ingredient of the transaction process.And trust and risk are two closely related factors to make security decisions during transaction process in an uncertain environment that hidden risks.The existing trust models mostly regard risk as a supplement to trust,or neglect risk.This will result in that the security decision is unilateral and subjective.To address the problem,this paper proposes a trust model based on behaviors risk evaluation.In this model,a set of feature matching rules was established based on asset identification,vulnerability identification and threat identification for the system,a complex weighting function was constructed to compute the potential risk implied in behaviors of the entities,and a trust computation method based on risk was designed.The application of the proposed model and the experimental results show that the proposed model can efficiently identify the potential risk implied in behaviors of the entities,and correctly compute the changing risk and trust according to the changing behaviors of the entities,which provide objective and reliable information to correctly make security decision for the system.