Role-Based Access Control (RBAC) is based on what principle?

Role-Based Access Control (RBAC) is fundamentally designed around the principle of assigning permissions based on a user's job role within the organization. In an RBAC system, roles are established that encompass certain responsibilities and access rights, and users are assigned to these roles based on their job functions.

This approach allows for a structured method of managing user permissions, ensuring that individuals have access only to the resources necessary for their specific roles. For instance, a payroll officer might have access to sensitive payroll data that other employees do not need, while a HR manager might have access to employee records. This minimizes the risk of unauthorized access and adheres to the principles of least privilege, enhancing overall security.

In contrast, the other options do not align with the core concept of RBAC. Geographical location of users may be relevant in certain access control methods but does not define user roles. The user's personal preferences are not typically considered when assigning roles, as RBAC is focused on organizational needs rather than individual choices. Similarly, the level of encryption strength pertains to data security rather than access control mechanisms. Thus, option B encapsulates the essence of RBAC effectively, reflecting its reliance on organizational roles to govern access permissions.