Abstract
Access control technology protects cloud from being accessed illegal. However, traditional access control technology cannot meet the new features of the cloud environment. In order to improve the deficiency of the current multi domain access control in timeliness and flexibility. This paper put forward a dynamic access control policy on the basis of task driving idea. New method combined the advantage of RBAC and task driving model, joined with limit aging and real time strategy synthesis. Comparative trial show that new policy had an advantage in flexibility and availability of multi-domain access control model.
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