Interconnectivity of computers in network environments increases the risk of security breach in distributed computer systems. In many system architectures security is provided only in application space. This paper proposes an operating system enforced access control policy where Role Based Access Control and Privilege Management Infrastructure(PMI) based on X.509 attribute certificates are integrated into the operating system kernel. The resulting architecture tries to leverage the cost of maintaining the security policy by providing an easy way for managing security role assignments to users of the system.
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