Date of Award

11-19-2009

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Computer Science

First Advisor

Coskun Bayrak

Abstract

In large scaled organizations deployed with Role-based Access Control, it is desired to have role delegation services within the domain of the corporation. But there is no widely accepted delegation model yet due to the complicated properties of authorization. The delegation model needs to bridge resources, policies, owners and users perfectly which demands more dimensions to be managed than the authentication process conducts. In this research work, we are proposing a prototype that enables delegation service for group users communicating with multicasting channels, the Role-based Access Control applied for both the communications and the user credentials of authorization. We combined a Secure Delegation model and a Multi-Channel Encoding Framework into the underlying application. The proposed Secure Delegation model employs quasirandomness into user certi?cate to encode RBAC information as a Secure Authorization Token in place of Attribute Certi?cate. The Multi-Channel Encoding Framework is another algorithm we are implementing for multicasting communications with RBAC enabled. A trust negotiation process with token of RBAC involved will give a new proof of concepts by these two approaches working together.

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