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2008
IEEE

The Role Hierarchy Mining Problem: Discovery of Optimal Role Hierarchies

10 years 11 months ago
The Role Hierarchy Mining Problem: Discovery of Optimal Role Hierarchies
Role hierarchies are fundamental to the role based access control (RBAC) model. The notion of role hierarchy is a well understood concept that allows senior roles to inherit the permissions of the corresponding junior roles. Role hierarchies further ease the burden of security administration, as there is no need to explicitly specify and maintain a large number of permissions. Given a set of roles or user permissions, one may construct a number of alternative hierarchies. However, there does not exist the notion of an optimal role hierarchy. Optimality helps in maximizing the benefit of employing the role hierarchy. In this paper, we propose such a formal metric. Our optimality notion is based on the smallest graph representation of the role hierarchy (minimal in the number of edges) having the same transitive closure as any alternate representation. We show why this makes sense as well as ways to achieve this. The main contributions of this paper are to formalize the notion of optim...
Qi Guo, Jaideep Vaidya, Vijayalakshmi Atluri
Added 28 May 2010
Updated 28 May 2010
Type Conference
Year 2008
Where ACSAC
Authors Qi Guo, Jaideep Vaidya, Vijayalakshmi Atluri
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