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Single Sign-Onnoun · abbr.

Signing in once with a central identity to access multiple systems.

SSO delegates authentication to a central identity provider, so users sign in once and access connected applications without separate passwords for each.

The security benefit is centralised control: joiners are provisioned and leavers are cut off in one place. That also concentrates risk, which is why SSO and strong second-factor authentication belong together.

Also called

  • SSO
  • federated login

See it in AWRA OpsHub

Security Operations

Single Sign-On is not just a definition here

Data & Systems runs on this vocabulary every day in AWRA OpsHub — 19 of our 257 glossary terms describe things the platform actually does.