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Summary: Framework for Authentication and Access Control of Client-Server
Group Communication Systems
Yair Amir, Cristina Nita-Rotaru, Jonathan R. Stanton
Department of Computer Science
Johns Hopkins University
3400 North Charles St.
Baltimore, MD 21218 USA
fyairamir, crisn, jonathang@cs.jhu.edu
Abstract
Researchers have made much progress in designing secure and scalable protocols to provide
speci c security services, such as data secrecy, data integrity, entity authentication and access
control, to multicast and group applications. However, less emphasis has been put on how to in-
tegrate security protocols with modern, highly eÆcient group communication systems and what
issues arise in such secure group communication systems. In this paper, we present a
exible
and modular architecture for integrating many di erent authentication and access control poli-
cies and protocols with an existing group communication system, while allowing applications
to provide their own protocols and control the policies. This architecture maintains, as much
as possible, the scalability and performance characteristics of the unsecure system. We discuss
some of the challenges when designing such a framework and show its implementation in the
Spread wide-area group communication toolkit.
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