Role-based access control (RBAC) grants access based on predefined roles, while attribute-based access control (ABAC) evaluates attributes about users, resources, actions, and environmental conditions. ABAC provides greater flexibility and helps eliminate the need for excessive role creation.

Zero Trust is a security methodology built on the principle of “never trust, always verify.” Rather than relying on implicit trust, Zero Trust continuously and transparently verifies every access request in real time. When executed effectively, it strengthens security, reduces complexity, and helps prevent the financial and reputational damage of cybersecurity incidents. This approach grants access only after checking context signals. It creates a fine-grained, dynamic access control layer that is vital to modern cybersecurity.

The Principle of Least Privilege (PoLP) is a security best practice that gives users, devices, and applications only the minimum access necessary to perform their tasks — nothing more. In a Zero Trust architecture, PoLP is enforced dynamically through fine-grained, policy-based access controls that continuously verify whether access should still be granted based on real-time context. By combining PoLP with Zero Trust, organizations ensure that permissions are not only limited but also continuously validated, keeping sensitive resources secure.

Authorization enforces who can access what resources under which conditions. By applying policies consistently and capturing every access decision, organizations can demonstrate compliance with regulatory access control requirements.