An Efficient Role Based Access Control System for Cloud Computing

coRBAC is a specifically optimized RBAC system for cloud computing environment. It inherits the existing RBAC's role model and dRBAC's domain model, optimizes and improves the access control system for services which are hosted on the cloud computing platform. coRBAC greatly improves the certification process and user experience by reducing the unnecessary process of establishing secure connection and setting up multi-level cache, reduces the space complexity and time complexity of access control system.