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Multiple-session SoD problem is addressed in the static constraint RBAC model. An improved formal static constraint RBAC model is proposed and it will check the change of the UA relation to decide whether the union of the user's role set will satisfy the MER constraint during an administrative session. If it will not satisfy the constraint, some necessary withdrawing will be performed. The improved...
Vulnerability discovery is base technology in information system development, product testing and counterinformation. At present, vulnerability discovery already has been turned into the hot spot of the global security researches. There are so many kinds of vulnerability discovery methods. Many vulnerabilities has been found each year. But the frame work of the vulnerability discovery is out of the...
Traditional trust models are based on reputation which is only a numerical value. Therefore, it is not fit for fine-grained access control which is needed in many online applications. Towards this problem, a novel trust model based on temporal historical data for access control is proposed. It could provide flexible method for users to customize specific access control rules. A policy language is...
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