关键词: 信任协商 Bayesian 访问控制 反馈

Abstract:

Trust negotiation （TN） is an approach to establishing trust between strangers through iterative disclosure of digital credentials. Providing relevan   t feedback enhances system usability when a user is denied access to a resource during a trust negotiation process, especially in systems where permissi ons change in unpredictable ways due to contextual informa- tion. However, providing feedback unconditionally may leak valuable business information or    jeopardize individuals ＇ privacy. Based on the analysis of the existing problems in access control, this paper introduces the Bayesian probability meas   surement method to trust negotiation, and presents a Bayesian--based trust negotiation model （BBTN）. The mechanism provides feedback information by co omputing the probability to enhance the probability of successful access. The method not only protects the system＇s sensitive information, but also enh  hances the system usability.

Key words: （trust negotiation, Bayesian, access control, feedback）