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Trust management systems are frameworks for authorization in modern distributed systems, allowing remotely accessible resources to be protected by providers. By allowing providers to specify policy, and access requesters to possess certain access rights, trust management automates the process of determining whether access should be allowed on the basis of policy, rights, and an authorization semantics. In this paper we survey modern stateof-the-art in trust management authorization, focusing ondoi:10.1145/1380584.1380587 fatcat:4ablaejrwvccrpcarkf4cfrbiq