OAuth 2.0 Flows: Auth Code, PKCE, Client Credentials
Each OAuth 2.0 grant type explained with flow diagrams, when to use each, and why PKCE replaces the implicit flow.
Published:
Tags: security, oauth, authentication
OAuth 2.0 Flows: Authorization Code, Client Credentials, Device OAuth 2.0 is the authorization framework that powers "Sign in with Google," Stripe's API access, GitHub Actions secrets, and your smart TV's Netflix login. But OAuth is not one protocol — it defines multiple grant types (flows) for different client contexts. Using the wrong flow for your use case is a common security mistake. This guide explains all four major grant types and when to use each. The Core Concept: Delegated Authorization OAuth 2.0 enables a resource owner (a user) to grant a client application access to resources hosted by a resource server, without sharing their credentials with the client. The key parties: Resource owner: The user who owns the data Client: The application requesting access Authorization…
All articles · theproductguy.in