IdP (Identity Provider)

An Identity Provider (IdP) is a service that manages digital identities and delivers authentication assertions to third-party applications (Service Providers). Dominant protocols are SAML 2.0 (enterprise, SSO Okta/Azure AD) and OIDC/OAuth 2.0 (web, FranceConnect). In the context of electronic signature, the IdP plays two roles: (1) authenticate the signer when accessing the signature portal (MFA via enterprise SSO); (2) provide verified identity attributes (name, email, employee number) that feed the signature certificate and audit trail. FranceConnect is the French public IdP enabling "substantial" trust level for advanced signatures intended for state services. Certyneo integrates with SAML and OIDC IdPs via the administration console.