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An organisation wants a single sign-on across AWS, Microsoft 365, and Salesforce so users have one identity. Which technology pattern enables this?
AUsing one shared password for the entire company
BPosting credentials in every employee's browser bookmarks
CManually creating local accounts in every app independently
DIdentity federation using SAML or OIDC against a central identity provider (e.g. Entra ID, Okta, Google Workspace)
Answer & Solution
Correct answer: D. Identity federation using SAML or OIDC against a central identity provider (e.g. Entra ID, Okta, Google Workspace)
Federation (SAML / OIDC) lets one IdP issue tokens accepted by many SPs — the canonical SSO pattern. The other options are insecure or non-scalable.
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