Authentication Mechanisms: JWT, OAuth, and Single Sign-On (SSO)

The article compares how JWT, OAuth 2.0, and SSO address different security needs.

JWT fits identity claims, OAuth 2.0 handles delegated access, and SSO simplifies login across multiple apps.

The recommended pattern is short-lived JWTs, secure refresh-token storage, and optional SSO where needed.

It also covers key flows and standards such as authorization code flow, PKCE, OpenID Connect, and SAML.