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A distributed security architecture is proposed for incorporation into group oriented distributed systems, and in particular, into the Isis distributed programming toolkit. The primary goal of the architecture is to make common group oriented abstractions robust in hostile settings, in order to facilitate the construction of high performance distributed applications that can tolerate both component failures and malicious attacks. These abstractions include process groups and causal group multicast. Moreover, a delegation and access control scheme is proposed for use in group oriented systems. The focus is the security architecture; particular cryptosystems and key exchange protocols are not emphasized.

A distributed security architecture is proposed for incorporation into group oriented distributed systems and, in particular, into the Isis distributed programming toolkit. the primary goal of the architecture is to preserve the Isis abstractions in hostile environments. These abstractions include process groups and casual and atomic group multicast. Moreover, a delegation and access control scheme is proposed for use in group oriented systems. The focus of the paper is the security architecture; particular security protocols and cryptosystems are not emphasized.