Sylvia Osborn, The Role Graph Model and its Extensions
from CERIAS Weekly Security Seminar - Purdue University
The Role Graph Model was first introduced by Nyanchama and Osborn in 1994. It has been extended over the years to include parameterized roles, an administrative model and a delegation model. We will show how the semantics of our role graph operations differ from those of the ANSI standard. Then we will discuss how to simulate DAC, and how the underlying basic model helped us to understand and expand the model to deal with delegation. The present and future of RBAC will also be discussed. About the speaker: Sylvia Osborn received her PhD from the University of Waterloo. Since 1977 she has been a faculty member in the Computer Science Department at the University of Western Ontario in London, Ontario, Canada, for which she has briefly acted as Chair. She is the author of numerous research papers, starting in the database field in dependency theory, and object-oriented databases. More recently she has been active in research into role-based access control including administration of access control, delegation, access control in the semantic web and database intrusion detection.
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