What is the difference between OAuth Implicit Flow and Authorization Code?

What is the difference between OAuth Implicit Flow and Authorization Code?

The OAuth Implicit Flow is designed for client-side applications, while the Authorization Code flow is for server-side applications. The main difference lies in how tokens are obtained and the security implications.

Can you explain why the Authorization Code flow is considered more secure?

Sure! The Authorization Code flow involves exchanging an authorization code for an access token on the server side, which keeps the client secret secure. In contrast, the Implicit Flow exposes the access token directly in the URL, making it more vulnerable.

When should I use the Implicit Flow instead of the Authorization Code?

You might use the Implicit Flow for public clients, like single-page applications, where you can't securely store client secrets. However, it's generally recommended to use Authorization Code flow with PKCE for better security.

What is PKCE and how does it enhance security?

PKCE, or Proof Key for Code Exchange, adds an additional layer of security to the Authorization Code flow by requiring a code verifier and code challenge, preventing authorization code interception.