Define user-based access control, role-based access control, and context-based access control. Give an example of each term.

role-based access control (RBAC) is an approach to restricting system access to authorized users. Access based on users individual roles

User-based access control (UBAC) is access based on users individual identities

Context-based access control (CBAC) is access based on users identity, role, location, and time of access