#OAuth

Articles about OAuth — exploring patterns, best practices, and real-world implementations in production systems.

3 posts tagged with oauth. ← All posts

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Pratik Dhanave · ·6 min read

The OAuth Flows

OAuth isn't one procedure — it's a family of flows for different kinds of clients, and picking the wrong one is a security bug, not a style choice. The good news is that modern guidance has collapsed the confusion: for almost every case today, the answer is the authorization code flow with PKCE, and knowing why the alternatives were deprecated is knowing OAuth security.

OAuth isn't one procedure — it's a family of flows for different clients, and picking the wrong one is a security bug. Modern guidance collapsed the confusion: for almost every case, the answer is the authorization code flow with PKCE.

#OAuth#Identity#Security#Authorization#Authentication
Pratik Dhanave · ·5 min read

OAuth 2.0: Delegated Authorization

OAuth solved a specific, once-terrible problem: how does an app access your data on another service without you handing over your password? Its answer — a scoped, revocable token granted through a trusted intermediary — is elegant, but only if you remember what OAuth actually is. It's authorization, not login, and everything about it makes sense once you hold that firmly.

OAuth solved a once-terrible problem: how does an app access your data on another service without your password? Its answer — a scoped, revocable token through a trusted intermediary — is elegant, but only if you remember it's authorization, not login.

#OAuth#Identity#Security#Authorization#Authentication
Pratik Dhanave · ·14 min read

Authentication: Proving Who Is Calling Your API

The second post in the API Security series — a practical tour of API keys, session cookies, bearer tokens, OAuth 2.0, OIDC and JWTs, plus how to verify a token correctly and where authentication quietly breaks.

Proving who is calling: API keys vs sessions vs bearer tokens, OAuth 2.0 grant types and OIDC, and JWT validation done right — the alg:none / algorithm-confusion pitfalls, verifying signature/exp/aud/iss, and access vs refresh token rotation.

#API Security#Authentication#OAuth#JWT#Security#APIs

All posts on this site are written by Pratik Dhanave, an Agentic AI Architect with 7+ years building production distributed systems, multi-agent AI platforms, and cloud-native infrastructure. About the author → Each article includes working code, architecture diagrams, and references to the specific frameworks and standards discussed. Browse all posts or explore related topics using the tag cloud above.