The Research And Application Of Dynamic Trust Management On Interoperability Model

In the paper, on the background of National 863 Project-"Information Interoperability Technology for Distributed Transport System", interoperable security and collaboration were taken as the starting point, interoperable access control as the breakthrough point, dynamic trust management as the main line and it having been applied to the interoperability model, aiming to strengthen the resource sharing and collaboration between the entities through trust, to form and transform cooperative relations between the entities as to realize logic reconfiguration of the interoperability, to access and control between different trust domains in an open and distributed environment dynamically, to provide a dynamic security mechanism for interoperability, which has theoretical and practical meanings to a certain degree. First of all, based on the analysis of interoperable access control policy and trust management, with the view of the characteristic of interoperability-openness, autonomy, serviceability, hierarchy,dynamics etc, dynamic trust management was applied to the interoperability model; and the qualitative and quantitative factors that affected interoperable trust between entities were analyzed, and the evaluation index system of interoperable trust was established.Secondly, searching algorithm for interoperable recommend trust path based on MMAS was proposed, which is valuable in the dynamic changes of interoperable web trust. Thirdly, dynamic and comprehensive evaluation method for interoperable trust based on fuzzy comprehensive assessment with variable weights theory was proposed, to provide an important basis for multi-user interoperability and a decision support for access control.Finally, with the view of the characteristics of the information interoperability for distributed transport systems, combined with Object Based Access Control (OBAC), trust-based access control of interoperability (DTM-OBAC) was proposed. The model goes for information sharing in transport industry, to settle the large amount, great variety and frequent update of traffic information, to access and control dynamically between different trust domains, to provide a security mechanism for interoperability between transport systems.