Overview

OAuth 2.0 and OpenID Connect are modern security protocols that allow you to log in to websites and apps using your existing accounts from other services, like Google or Facebook. This lesson introduces how these systems work together to keep your information safe while making login easier and more convenient.

Key Points

• OAuth 2.0 is an authorization framework that lets applications request permission to access your data without seeing your password
• OpenID Connect (OIDC) adds authentication on top of OAuth 2.0, allowing apps to verify who you are
• The authorization code flow is the most common and secure way for web applications to use OAuth 2.0
• Tokens are used instead of passwords to grant temporary access to protected resources
• OAuth 2.0 and OIDC are industry standards used by major companies to provide secure single sign-on experiences

Why This Matters

Understanding OAuth 2.0 and OIDC is essential for anyone building web or mobile applications, as these protocols are the foundation of modern secure authentication. They protect your personal data while enabling seamless login experiences across the internet.

Suggested Next Steps

• OAuth 2.0 Authorization Code Flow
• JSON Web Tokens (JWT)
• Building Secure Web Applications

Sources

• OAuth 2.0 Authorization Framework (RFC 6749)
• OpenID Connect Core 1.0 Specification