A security token is a portable device that authenticates a person's identity electronically by storing some sort of personal information. The owner plugs the security token into a system to grant access to a network service. The Basics of a Security Token Security tokens come in many different forms, including hardware tokens that contain chips, USB tokens that plug into USB ports, and wireless Bluetooth tokens or programmable electronic key fobs, which activate devices remotely for example, to gain access to a car or apartment building. Single sign-on services also use security tokens to log users into third-party websites seamlessly. Disconnected tokens are not linked to the computer or network in any way; rather, the user enters the information from the token manually into the system.
Tokens Tokens There are basically two main types of tokens that are related to identity: ID tokens and access tokens. For example, information about tokens there's an app that uses Google to log in users and to sync their calendars, Google sends an ID token to the app that includes information about the user. The app then parses the token's contents and uses the information including details like name and profile picture to customize the user experience. Be sure to validate ID tokens before using the information it contains.
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Information about tokens can use a library to help with this task. Each token contains information for the intended audience which is usually the recipient.
According to the OpenID Connect specification, the audience of the ID token indicated by the aud claim must be the client ID of the application making the authentication request. If this is not the case, you should not trust the token.
The audience the aud claim of the token is set to the application's identifier, which means that only this specific application should consume this token. See the JWT Handbook for more information.
Access tokens Access tokens which aren't always JWTs are indicators on binary options 24opton to inform an API that the bearer of the token has been authorized to access the API and perform a predetermined set of actions specified by the scopes granted.
In the Google example above, Google sends an access token to the app after the user logs in and provides consent for the app to read or write to their Google Calendar.
What makes JSON Web Tokens (JWT) secure?
Access tokens must never be used for authentication. Access tokens cannot tell if the user has authenticated.
The only user information the access token possesses is the user ID, located in the sub claim. In your applications, treat access tokens as opaque strings since they are meant for APIs.
Password types[ edit ] All tokens contain some secret information that is used to prove identity.
Your application should not attempt to decode them or expect to receive tokens in a particular format. It only contains authorization information about which actions the application is allowed to perform at the API scope claim.
This is what makes it useful for securing an API, but information about tokens for authenticating a user.
Specialized tokens There are three specialized tokens used in Auth0's token-based authentication scenarios: Refresh tokens: A token used to obtain a renewed access token without having to re-authenticate the user. IDP access tokens: Access tokens issued by identity providers after user authentication that you can use to call the third-party APIs.
- Access Tokens In this article Access tokens are used in token-based authentication to allow an application to access an API.
- Security token - Wikipedia