A penetration tester identified numerous flaws that could lead to unauthorized modification of critical data. Which of the following would be best for the penetration tester to recommend?

Flat access means all users have the same level of access, which is highly insecure and directly contrary to the goal of preventing unauthorized data modification.

Role-Based Access Control (RBAC) is the best recommendation because it centrally manages access permissions based on predefined roles within an organization. This ensures users are granted only the minimum necessary privileges to perform their job functions, significantly reducing the risk of unauthorized modification of critical data.

Permission-based access control is a general term, and while RBAC is a type of permission-based control, RBAC specifically organizes permissions into roles, which is a more structured and manageable approach than individual permission assignment, especially for scalability.

Group-based control model is a common way to implement access control, but RBAC is a more specific and structured model that defines permissions based on roles rather than just arbitrary groups, often allowing for more granular and policy-driven access management.