The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a novel multi-hierarchy and task-role based access control model named H-TRBAC. In the model, we create two multi-hierarchical sets, i.e., a role set and a task set. In the task hierarchy, a task may have some partial ordering relationships with other tasks. A task can not be scheduled until its entire ancestors are completed. It is the task??s duty to select necessary roles and...