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Authorization policies provide access control to the system resource. This paper proposes a formal modal logic approach for the specification and reasoning about authorizations. Especially we investigate and handle the situation where the security agent's knowledge is not specific and the decisions for accessing the system resource are to be made based on the agent's knowledge. We introduce modal...
Authorization plays an essential role to ensure the security of a wide variety of computing and IT systems such as data management systems, e-trading systems, database transaction systems, etc. This paper aims to propose a high level formal language for specifying and evaluating distributed authorizations with delegation, develop a new method for credential chain discovery, and implement a system...
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