What is the PRIMARY purpose of a federated identity system?
A CISSP practice question covering Domain 5: Identity and Access Management (IAM). Try answering before reading the explanation below.
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Why "Allow users to authenticate once and access multiple organizations' resources" is the right answer
Federation lets identity be vouched for across security domains — the home IdP authenticates, partner SPs trust the assertion. SAML, OIDC, and WS-Federation are common protocols. It does not consolidate password storage; each org keeps its own IdP.
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