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In pervasive computing environments (PCE), context information can have a strong impact on application adaptation, not only at application logic level but also security management level. From a access control perspective, it is required that the access control models take into account context information such as location and time, in determining whether access should be allowed or not. As context information represents real-world situations, it is associated with certain quality indicators that can influence directly in the access control decisions. In this paper, we showed the use of context information and its quality indicators to grant and to adapt access permissions to resources in the PCE.