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Research On Extended Role Graph Model Based On Hybrid Hierarchy

Posted on:2011-04-13Degree:MasterType:Thesis
Country:ChinaCandidate:X Y LiFull Text:PDF
GTID:2178330338489888Subject:Management Science and Engineering
Abstract/Summary:PDF Full Text Request
Role-Based Access Control is the most popular access control model nowadays. The Role Graph Model (RGM), which is one of the RBAC models, is used to visualize the different hierarchy relations to make the management of RBAC more convenient.Role hierarchy defines the inheritance between roles, and there are three types of role hierarchies: permission-inheritance-only inheritance, activation-inheritance-only- inheritance, and the combined permission-inheritance and activation hierarchy. However, the RGM does not distinguish the different inheritance semantics of role hierarchy, and may make operations on role graph violate the least principle.After analyzing the demerits of RGM, this thesis introduced the hybrid inheritance relationships and added it to the role graph model, a set of inference rules have also been introduced, which can be used to infer the hierarchical relationship between two roles without direct relevance.Formal specification of the new role graph model using Z notation is given, as well as its basic elements and its functions in detail, a formal specification can make the role graph model be understood more easily.We designed and implemented a prototype based on the proposed role graph model, and an experiment of it is given to show the correctness of it.
Keywords/Search Tags:Role-Based Access Control, Role Graph Model, Hybrid Hierarchy, Formal Specification
PDF Full Text Request
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