... models and even more have recently evolved to conform with the challenging requirements of resource protection. That makes it hard to classify the models and decide for an appropriate one satisfying security needs. Therefore, this study aims to guide through the plenty of access control models...

... statically. Meanwhile, the enable concept is to assign user to role in runtime. The functions, which get historical information about assigning and enabling permissions for roles are defined in a similar way. Context-aware access control models are more and more necessary and important...