What are the differences between OAuth2 Implicit Flow and Authorization Code?

What are the differences between OAuth2 Implicit Flow and Authorization Code?

The OAuth2 Implicit Flow is designed for client-side applications, while the Authorization Code flow is for server-side applications. The main difference is that the Implicit Flow returns an access token directly in the URL, whereas the Authorization Code flow requires an additional step to exchange a code for an access token.

Why would I choose one flow over the other?

You would choose the Implicit Flow for single-page applications where you want a quicker user experience without server-side code. The Authorization Code flow is more secure and is preferred for applications that can keep client secrets safe, like web apps.

Are there any security concerns with the Implicit Flow?

Yes, the Implicit Flow is less secure because the access token is exposed in the URL, making it vulnerable to interception. It's recommended to use the Authorization Code flow with PKCE for better security.

Can you give me an example of when to use each flow?

Sure! Use the Implicit Flow for a public client like a mobile app that needs quick access to resources. Use the Authorization Code flow for a web application that can securely store client secrets.