In practice
The standards are SAML and OpenID Connect, and supporting one of them is a modest piece of work if planned and an awkward one if bolted on after the user model has been built around local accounts. If you expect enterprise or public-sector customers, design for external identity from the beginning even if you launch with passwords.
Where it fits in a build
Necessary for internal tools at any organisation with central IT, and for any product sold to enterprises. Optional for products sold to individuals or very small teams.
Common mistakes
- Treating SSO as authentication only and ignoring provisioning, so accounts are created centrally and never removed.
- Charging for SSO as a premium tier, which security teams increasingly treat as a red flag.
- No break-glass administrator account, so an identity provider outage locks everyone out.
Related terms
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