The first step of the web flow is to request authorization from the user. This also means the access token is never visible to the user or their browser, so it is the most secure way to pass the token back to the application, reducing the risk of the token leaking to someone else. When the application makes the request for the access token, that request can be authenticated with the client secret, which reduces the risk of an attacker intercepting the authorization code and using it themselves. The application exchanges that code for the access token. When the user authorizes the application, they are redirected back to the application with a temporary code in the URL. The authorization code flow offers a few benefits over the other grant types. The code itself is obtained from the authorization server where the user gets a chance to see what the information the client is requesting, and approve or deny the request. The authorization code is a temporary code that the client will exchange for an access token. Short-lived tokens with Long-lived authorizations.User Experience and Alternative Token Issuance Options.OAuth for Browserless and Input-Constrained Devices.Checklist for Server Support for Native Apps.Deleting Applications and Revoking Secrets.Security Considerations for Single-Page Apps.User Experience and Security Considerations.
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