SSO (Single Sign-On)
An authentication scheme that allows users to log in once with a single set of credentials and gain access to multiple related systems without re-authenticating.
Single Sign-On allows users to authenticate once and access multiple applications without re-entering credentials. An identity provider (IdP) handles the authentication and issues tokens that connected applications accept.
SSO improves user experience (fewer passwords to remember), reduces help desk costs (fewer password reset requests), and centralizes security controls (enforce MFA once, apply everywhere). Common SSO protocols include SAML 2.0, OpenID Connect, and OAuth 2.0.
However, SSO doesn’t cover everything. Many applications don’t support SSO, and shared team accounts (social media, vendor portals, WiFi) require traditional credentials. A team password manager fills this gap, managing the credentials that SSO can’t replace.
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