SSO
Single Sign-On
Authenticating once to access multiple systems.
Single sign-on lets a user authenticate once and gain access to multiple applications without re-entering credentials, improving usability and reducing password fatigue and reuse. It is implemented with federation protocols such as SAML and OpenID Connect that pass trusted assertions between an identity provider and service providers. The tradeoff is concentrated risk: a compromised SSO account can unlock many systems, so it should be paired with strong multifactor authentication. Distinguish SSO from federation, the underlying trust relationship that enables it.
Single Sign-On: one login for many apps (convenient, but one stolen login reaches them all).
Looking SSO up is step one. Getting tested on it is step two.
A free account opens all 4 Domain 1 objectives, 271 exam-style questions with a lesson and a lab on each, a placement check that skips what you already know, and a dated plan. No card.
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