Dynamic Trust Evaluation Model Under Distributed Computing Environment

With the development of computer networks,distributed computing technology has been far and wide used and it makes that trust evaluation is more and more significant for computing nodes.Referring to the people's trust relationship model of Sociology and considering the dynamic,continuity and uncertainty of trust under the network environment,this paper proposes a dynamic trust evaluation model under distributed computing environment,based on the Dempster-Shafer Theory and Shapley entropy.The trust evaluation is partitioned into two stages: direct trust evaluation stage and integrative trust evaluation stage.The trust evaluation model uses historical interactive information to compute the direct trust.Shapley entropy evaluates the quantity of information of each node's direct trust function,and then the direct trust is revised in consideration of each node's reliability and its quantity of information.Afterwards,they compute the integrative trust derived from the revised direct trust of all nodes according to the Dempster rules.Additionally,the dynamic trust evaluation model is analyzed by simulation experiment and present the plans for future work.