Definition
Role-based access control, or RBAC, is a method of restricting system access to authorized users based on their role within an organization. Instead of assigning permissions to individual users, RBAC assigns permissions to roles, and then assigns users to those roles. This simplifies access management by grouping users with similar job functions and granting them the necessary privileges to perform their tasks. RBAC is crucial for maintaining security and compliance by ensuring that individuals only have access to the data and resources they need, thereby minimizing the risk of unauthorized access or data breaches. For example, a customer support representative might be assigned a role that allows them to view customer records but not modify billing information, while a billing specialist would have the opposite permissions. This differs from discretionary access control (DAC) where the owner of a resource determines who can access it. RBAC is a fundamental concept tested in cybersecurity certifications like CompTIA Security+ and CySA+.