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Access control mechanisms control which subjects (such as users or processes) have access to which resources. To facilitate managing access control, policy authors increasingly write access control policies in XACML. Access control policies written in XACML could be amenable to multiple-duty-related security leakage, which grants unauthorized access to a user when the user takes multiple duties (e.g., multiple roles in role-based access control policies). To help policy authors detectdoi:10.1109/ssiri.2009.63 dblp:conf/ssiri/HwangXH09 fatcat:d3qc2cphhbe5hdxe6oqzlmwamm