Trusted Access Control Model Based on Role and Task in Cloud Computing

In order to prevent illegal users access the cloud data frequently, this paper puts forward trusted access control model based on role-task in cloud computing. It can prevent the illegal users accessing cloud data more effectively. Combining the advantages of the role access control model and the task access control model, the concept of reputation value will be introduced, and a certain threshold will be given. It can control the user's interview times by judging the number of reputation value. What's more, it can make the users access cloud data based on historical records, and reduce the times of users of the frequent malignant access to data in the cloud effectively. Finally the experiment result shows that this access control is much more suitable for the dynamic access.