OAuth 2.1: What’s Changing and Why It Matters
Visual Overview: sequenceDiagram participant User participant App as Client App participant AuthServer as Authorization Server participant Resource as Resource Server User->>App: 1. Click Login App->>AuthServer: 2. Authorization Request AuthServer->>User: 3. Login Page User->>AuthServer: 4. Authenticate AuthServer->>App: 5. Authorization Code App->>AuthServer: 6. Exchange Code for Token AuthServer->>App: 7. Access Token + Refresh Token App->>Resource: 8. API Request with Token Resource->>App: 9. Protected Resource OAuth 2.1 is the next major evolution of the OAuth 2.0 authorization framework. It consolidates best practices, removes insecure legacy features, and improves security and developer experience for modern applications. ...