Abstract
Logical formulas and enumeration are the two major ways for specifying authorization policies in Attribute Based Access Control (ABAC). While considerable research has been done for specifying logical-formula authorization policy ABAC, there has been less attention to enumerated authorization policy ABAC. This paper presents a finite attribute, finite domain ABAC model for enumerated authorization policies and investigates its relationship with logical-formula authorization policy ABAC models in the finite domain. We show that these models are equivalent in their theoretical expressive power. We also show that single and multi-attribute ABAC models are equally expressive.
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