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Single Sign-On (SSO)

Reviewed 19 July 2026 Canonical definition Part of: Agent Identity & Access Terms →

An authentication method that allows users to log in once and gain access to multiple related applications without re-authenticating. Enterprise SSO typically uses SAML or OIDC to federate identity across services.

§01 / QUESTIONSterm: Single Sign-On (SSO)
Questions

Common questions.

What is Single Sign-On (SSO)?

An authentication method that allows users to log in once and gain access to multiple related applications without re-authenticating.

How is Single Sign-On (SSO) used in production?

Enterprise SSO typically uses SAML or OIDC to federate identity across services.

Which terms are related to Single Sign-On (SSO)?

Closely related concepts include Workload Identity, SPIFFE (Secure Production Identity Framework for Everyone), Claims-Based Identity, Machine-to-Machine (M2M) Authentication. Each is defined in the Prefactor glossary.

§02 / RELATEDnext: where this fits
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Where this fits.

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