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Abstract not found

Significant strides have been made in achieving strong semantics and security guarantees within group communication and multicast systems. However, the scope of available security policies in these systems is often limited. In contrast, the applications that require the services provided by these systems can differ significantly in their security policy needs. Often application designers have to either make significant compromises in using a given group communication system or build their own customized solutions, an error-prone task. This paper presents Antigone, a framework that provides a suite of mechanisms from which flexible application security policies may be implemented. With Antigone, developers may choose a policy that best addresses their security and performance requirements of an application requiring group communication. We describe the Antigone's mechanisms, consisting of a set of micro-protocols, and show how different security policies can be implemented usin...