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OAuth2 & OpenID Connect Deep Dive · Lesson

Refresh Tokens & Scopes

Learn about refresh tokens for obtaining new access tokens without re-authentication and the role of scopes in defining access permissions.

Keep Your Apps Authorized

Imagine using an app that needs to access your online photos. It gets permission, but what if that permission expires after just an hour?

You'd have to log in again and grant permission every single time! That's not a great user experience, is it?

The Short Life of Access Tokens

Access tokens are like temporary keys. They grant access to specific resources (like your photos) for a short time, often minutes or hours.

This short lifespan is a crucial security feature. If an access token is stolen, an attacker has a limited window to use it, reducing potential damage.

All lessons in this course

  1. PKCE for Public Clients
  2. Refresh Tokens & Scopes
  3. Resource Owner Password Credentials
  4. Token Exchange (RFC 8693)
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