Differences between Authentication and Authorization
This tutorial compares authentication and authorization and lists the main differences between them. Learning these differences will help you in managing the network more confidently.
Authentication and authorization are two cybersecurity terms. Computers and networks use these terms to define the techniques they use to secure resources. They use two levels of protection to protect their resources. On level one, they verify the user or the service that wants to access the resources. On level two, they check the access level of the resources. Authentication works on level one. Authorization works on level two. Authentication defines who can access the resources. Authorization describes the extent to which the authenticated user or service can access resources.
Differences between authentication and authorization
The following table compares authentication with authorization and lists their main differences.
| Criteria | Authentication | Authorization |
| Access | Authentication works on the user or service level. A user or service either gets access or not at all. | Authorization works on the object level. A user or service can get all, limited, or no access to objects. |
| Configuration | Authentication is more straightforward to configure, implement, and manage than authorization. | Authorization is more complicated to configure, implement, and manage than authentication. |
| Layer | Authentication is the first layer of defense against unauthorized access. | Authorization is the second layer of defense. It works after authentication. |
| Security | Authentication provides more security than authorization. | Authorization is flexible. It is less secure than authentication. |
| Complexity | Authentication is simple. | Authorization is complex. |
| Examples | Username and password, biometrics, smart card, PAP, and CHAP are examples of authentication. | File and folder permissions, System properties change rights, encryptions, and ACLs are examples of authorization. |
Conclusion
As a network or system administrator, you should understand the distinctions between authentication and authorization. Authentication involves users logging on to the network using their unique usernames and passwords. After authentication, users get access to specific network resources based on their permissions. The permission or right that determines which network resources users can access after authentication is known as authorization.
Author Laxmi Goswami Updated on 2025-10-16