Algorithms for Unified Hierarchy based Access Control

X. Zou, B. Ramamurthy, N.V. Vinodchandran, and R.K. Balachandran (USA)


Access control, unified hierarchy, computer and communi cation security, directed acyclic graph (DAG)


Access control is a fundamental security issue in any com puter or communication system where there are users and resources. Recently a novel approach for access control, called unified hierarchy (UH), was proposed. In this pa per, we present algorithms for implementing unified hier archy and combining two unified hierarchies into one. Fur ther, we propose typical queries for unified hierarchy and show that most of these queries can be executed more effi ciently in the unified hierarchy approach compared to other approaches for access control.

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