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Difference Between Authentication and Authorization


Both phrases are often used interchangeably in the context of security, particularly when it comes to getting access to a system. Both are very important subjects that are often connected with the web as important components of its service architecture. Both phrases, however, are entirely distinct and have completely different meanings. Despite the fact that they are often used in the same context with the same instrument, they are fundamentally different.

Authentication is the process of verifying your identity, whereas authorisation is the process of allowing access to the system. Simply said, authentication is the process of confirming who you are, while authorization is the process of confirming what you have permission to do.


Authentication is the process of verifying your identity by confirming your credentials, such as your User Name/User ID and password. Using your credentials, the system assesses if you are who you claim you are. The system uses login passwords to verify the user's identity in both public and private networks. Authentication is normally done with a username and password, but it may also be done using factors of authentication, which are other methods to be authenticated.

Authentication factors are the numerous aspects used by the system to validate a user's identity before providing him access to anything from a file to a bank transaction request. What a user knows, possesses, or is may all be used to identify his identity. In order to provide someone access to the system, at least two or all three authentication elements must be validated.


Authorization, on the other hand, comes when the system successfully authenticates your identity, granting you complete access to resources such as information, files, databases, finances, places, and almost anything else. Simply put, authorization affects your capacity to use the system and the degree to which you may do so. After the system verifies your identity via successful authentication, you are granted access to the system's resources.

The process of determining whether an authenticated user has access to certain resources is known as authorization. It validates your permissions before granting you access to information, databases, files, and other resources. Authentication, which certifies your ability to execute, is frequently followed by authorization. In basic words, it's the equivalent of granting someone formal licence to do whatever.

Comparison Table Between Authentication and Authorization

Authentication Authorization
  • Authentication verifies your identification before allowing you to use the system.
  • The level of authorization decides whether you have permission to use the resources.
  • It is the process of verifying a user's credentials in order to obtain access to their account.
  • It is the process of verifying whether access is allowed or not.
  • It checks to see whether the user is who he claims to be.
  • It establishes what a user is permitted to do and what he or she is not permitted to do.
  • A username and password are normally required for authentication.
  • Depending on the security level, the authentication elements needed for authorisation may differ.
  • Authentication is always done first since it is the initial stage in the authorisation process.
  • After successful authentication, authorization takes place.
  • Students at a specific institution, for example, must verify themselves before visiting the university's official website's student link. This is referred to as authentication.
  • For example, following successful login, authorisation decides precisely what information students are permitted to view on the university website.


Despite the fact that these names are often used interchangeably, they have completely distinct conceptions and meanings. While both ideas are important in web service architecture, particularly when it comes to allowing access to a system, knowing each phrase in terms of security is critical. While most people mistake one phrase with another, it is critical to grasp the essential distinction between the two, which is really rather easy. Authorization is what you can access and alter if authentication is who you are. Authentication is the process of ascertaining whether or not someone is who they claim to be. Authorization, on the other hand, establishes his access rights to resources.

About the author:
Adarsh Kumar Singh is a technology writer with a passion for coding and programming. With years of experience in the technical field, he has established a reputation as a knowledgeable and insightful writer on a range of technical topics.