What are the differences between OAuth 1.0 and OAuth 2.0?

What are the differences between OAuth 1.0 and OAuth 2.0?

OAuth 1.0 and OAuth 2.0 are both protocols for authorization, but they differ significantly in complexity and security. OAuth 1.0 requires cryptographic signatures for each request, while OAuth 2.0 simplifies this by using bearer tokens.

Which one is more secure?

OAuth 1.0 is generally considered more secure due to its use of signatures, but OAuth 2.0 can be secure if implemented correctly, especially with additional security measures like PKCE.

Can you explain what PKCE is?

PKCE, or Proof Key for Code Exchange, is an extension to OAuth 2.0 that enhances security for public clients by requiring a code challenge and verifier during the authorization process.

When should I use OAuth 1.0 over OAuth 2.0?

You might choose OAuth 1.0 if you need stronger security guarantees and are working with a legacy system that requires it. However, for most new applications, OAuth 2.0 is recommended due to its flexibility and ease of use.