Single Sign-On (SSO)

SSO lets a user access multiple apps with one login via a central identity provider.

Updated: 2026-03-05

Definition

Single Sign-On (SSO) allows users to authenticate once with an identity provider (IdP) and then access multiple applications without logging in repeatedly.

SSO reduces password fatigue and improves control when combined with centralized policies (MFA, conditional access).

Key points

Uses an Identity Provider (IdP) to issue tokens
Common in enterprise environments
Central policies can enforce MFA and device posture

Common mistakes

Thinking SSO means 'less secure' (it can be more secure with MFA + monitoring).
Not securing the IdP (IdP compromise impacts many apps).

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CompTIA Security+ (SY0-701)

Free Security+ SY0-701 mini test. Continue in the app for offline packs and detailed explanations.

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