Which type of access tokens does OAuth 2.0 use for authorization?

Which type of access tokens does OAuth 2.0 use for authorization?

• A. Static tokens
• B. Permanently valid tokens
• C. Short-lived tokens
• D. Non-expiring tokens

Answer: (C)

OAuth 2.0 primarily utilizes short-lived tokens, often referred to as access tokens, which are designed to have a limited validity period. This approach enhances security by minimizing the window during which a stolen token can be used. When a user authenticates and grants permission to an application, the application receives an access token that is valid for a brief time, typically ranging from a few minutes to a couple of hours. This short lifespan encourages frequent refreshes of these tokens, typically using a refresh token that allows the application to request a new access token without requiring the user to log in again. By employing this model, the security of user data is improved, as it reduces the risk associated with long-lived tokens which could potentially be compromised. In contrast, other types of tokens like static tokens, permanently valid tokens, or non-expiring tokens are not characteristic of OAuth 2.0’s design philosophy, which prioritizes security and timely access management. Security best practices advocate for the use of short-lived tokens to ensure that even if tokens are compromised, their usability is limited in duration.

OAuth 2.0 primarily utilizes short-lived tokens, often referred to as access tokens, which are designed to have a limited validity period. This approach enhances security by minimizing the window during which a stolen token can be used. When a user authenticates and grants permission to an application, the application receives an access token that is valid for a brief time, typically ranging from a few minutes to a couple of hours.

This short lifespan encourages frequent refreshes of these tokens, typically using a refresh token that allows the application to request a new access token without requiring the user to log in again. By employing this model, the security of user data is improved, as it reduces the risk associated with long-lived tokens which could potentially be compromised.

In contrast, other types of tokens like static tokens, permanently valid tokens, or non-expiring tokens are not characteristic of OAuth 2.0’s design philosophy, which prioritizes security and timely access management. Security best practices advocate for the use of short-lived tokens to ensure that even if tokens are compromised, their usability is limited in duration.