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Access control models are usually static, i. e., permissions are granted based on a policy that only changes seldom. Especially for scenarios in health care and disaster management, a more flexible support of access control, i. e., the underlying policy, is needed. Break-glass is one approach for such a flexible support of policies which helps to prevent system stagnation that could harm lives or otherwise result in losses. Today, breakglass techniques are usually added on top of standarddoi:10.1145/1542207.1542239 dblp:conf/sacmat/BruckerP09 fatcat:zjhl4tuxdrebbd6rfujxqp5xx4