Data Structures for Constraint Enforcement in Role-based Systems

Enforcing RBAC Policies over Data Stored on Untrusted Server (Extended Version)

One of the security issues in data outsourcing is the enforcement of the data owner’s access control policies. This includes some challenges. The first challenge is preserving confidentiality of data and policies. One of the existing solutions is encrypting data before outsourcing which brings new challenges; namely, the number of keys required to access authorized resources, efficient policy u...

A Cluster-Based Hybrid broadcasting mechanism for Quantum Systems with Power Management and delay Constraint in the MAC sub-layer

SEQUENTIAL PENALTY HANDLING TECHNIQUES FOR SIZING DESIGN OF PIN-JOINTED STRUCTURES BY OBSERVER-TEACHER-LEARNER-BASED OPTIMIZATION

Despite comprehensive literature works on developing fitness-based optimization algorithms, their performance is yet challenged by constraint handling in various engineering tasks. The present study, concerns the widely-used external penalty technique for sizing design of pin-jointed structures. Observer-teacher-learner-based optimization is employed here since previously addressed by a number ...

An Adaptable Approach for Integrity Control in Federated Database Systems

In database federations the integrity problem arises from the degree of heterogeneity and autonomy of participating component database systems. This causes integrity control more complicate than that in traditional centralized database systems. Semantic integrity should be considered in two phases: constraint federation and constraint enforcement. Otherwise, the administrators of component data...

Privacy Enforcement with an Extended Role-Based Access Control Model

Privacy enforcement has been one of the most important challenges in IT area. Current privacy practices within companies and organizations, e.g. enabling a P3P compliant policy, incorporating a privacy seal program, etc., cannot truly protect consumer privacy. Privacy protection can only be achieved by enforcing privacy policies within an organization’s online and offline data processing system...