Dynamic Trust Model Research And Apply In Distributed Environment

With the in-depth researches and applications of computer networks and large scale distributed systems,the morphology of application system translate from oriented-closed,familiar groups and relatively static services model to open,public accessible and dynamic collaboration services model.The Internet as a representative of open computing environments has some new features and requirements.It displayed mainly:the diversification of safety analysis subject,the incomplete of safety information,the relativization of safety metric,the complication of safety requirement.In the recent years,trust relationship modeling and management technology as new emerging technology are the key to solve the trust manage problem in network application.Dynamic trust management has become a hot topic and main direction in trust field.Therefore,designed dynamic trust model and trust management techniques for different application environments have both theoretic significance and practical applications.The main context is as follows:(1) Research on Connotation of dynamic trust relation:it emphasizes the analysis on different attributes of trust relation.It pay more attention to the analysis on trust context,environment,uncertain factors.The analysis of it is more thoroughly and deeply.(2) Research on dynamic trust module:In different application environments, we will establish reasonable formal description and reasoning system for trust demand.(3) Research on dynamic trust relation management::comparing to traditional trust management technical.The management of dynamic trust relationship has the following new features:①As much as possible to gather trust information,transformed into different input.②Trust management emphasis on dynamic monitoring and adjustment,inspecting more property of trust relationship, considering the association between different trust relationships.③with the decision support,trust and security technology are comprehensively considered.(4) Research on trust security:Trust security focus on the secure problems and solution strategy arisen by it.