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The User Authorization Query (UAQ) problem for RBAC is to determine whether there exists an optimum set of roles to be activated to provide a particular set of permissions requested by a user. It is a key issue related to efficiently handling users' access requests. Previous definitions of the UAQ problem have considered only the optimization objective for the number of permissions whereas the optimization...
Location-Based Social Network Systems (LBSNSs) are becoming increasingly popular. In LBSNSs, users can check in at various places, connect with their friends and share their check-ins (including users' locations and timestamps) with their friends and even the public. However, most LBSNSs pay on more attention to attracting users to join and actively use their systems rather than protecting users'...
Based on the iDM concept, this paper proposes an extensible data model with an 8-tuple representation, which can not only describe more complex data sources by extending the Group Component, but also contain rule-based security elements, which consist of Access Component and Authorization Component. Data model is detailed and two corresponding examples are analyzed to verify our approach.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.