Securing networked and Web-based systems can be costly because these open and easy-to-access systems leave a myriad of unwanted openings for hackers and other intruders to break into. Role-based access control (RBAC) is a security mechanism that can greatly lower the cost and complexity of securing large networked and Web-based systems. This volume covers the basic components of RBAC as well as deploying, supporting and administering RBAC.