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Severity Level of Permissions in Role-Based Access Control

by   S. V. Belim, et al.

The analysis of hidden channels of information leakage with respect to role-based access control includes monitoring of excessive permissions among users. It is not always possible to completely eliminate redundancy. The problem of ranking permissions arises in order to identify the most significant, for which redundancy is most not desirable. A numerical characteristic that reflects the value or importance of permissions is called the "severity level". A number of heuristic assumptions have been formulated that make it possible to establish the dependence of the severity level of permissions on the structure of the role hierarchy. A methodology for solving the problem is proposed, using analytic hierarchy process and taking into account these assumptions. The main idea is that the decision tree of the process will be the role graph.


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