Single Sign-On (SSO)
Single Sign-On (SSO) is an authentication mechanism that allows users to log in once with a single set of credentials to access multiple, independent software systems or applications without re-entering credentials. It centralizes authentication, typically using protocols like SAML, OAuth, or OpenID Connect, to manage user identities across different platforms. This enhances security by reducing password fatigue and simplifying access management.
Developers should learn SSO when building enterprise applications, SaaS platforms, or any system requiring secure, seamless user access across multiple services. It's essential for improving user experience by eliminating repetitive logins and for enhancing security through centralized authentication controls, audit trails, and reduced password-related risks like phishing. Use cases include corporate intranets, cloud-based tools, and federated identity systems.