SXMGovernment of Sint MaartenOfficial eID Platform
Substantial — SSO

Substantial assurance (SSO resume)

Citizen reused an existing eID portal session to access another application without repeating MFA. The original authentication time is preserved in auth_time.

https://eid.gov.sx/loa/substantial-sso

When this level is issued

  • Citizen already signed in to the eID portal
  • OIDC authorize resumed via citizen portal session
  • SXM SSO session reuses federated eID login

Authentication methods (amr)

amrMeaning
sessionSSO session resume — no fresh MFA

Guidance for relying parties

RPs must treat this differently from fresh MFA. For sensitive actions (payments, signing, data export), require step-up authentication in a future phase.

Substantial context via existing session.

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