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L’Identité Numérique La Poste (LINLP) is a solution that enables the secure verification and authentication of a user’s identity online.

It allows a partner service to:

• delegate user authentication
• rely on a previously verified identity
• retrieve trusted and certified data

👉 Users can therefore prove their identity online just as they would physically with an identity document.

LINLP is based on strong two-factor authentication:

• 1st factor: the user’s smartphone (trusted device)
• 2nd factor: validation using a secret PIN code or biometrics

👉 Authentication is always validated by the user on their phone.

The standard journey is as follows:

1. The user clicks on “Sign in with L’Identité Numérique”
2. They are redirected to the identification screen to enter their phone number
3. They receive an authentication request on their smartphone
4. They confirm using their secret code or biometrics
5. They are redirected back to the partner service

💡 The partner never manages user credentials or passwords.

LINLP can provide verified identity data, including:

• Core identity (Pivot Identity):
  • Birth name
  • Given names
  • Gender
  • Date of birth
  • Place of birth

• Contact information:
  • Email
  • Phone number

• Identity document information:
  • Document type
  • Issue date
  • Expiration date
  • Issuing country

• Account information:
  • Identity creation date
  • Expiration date

👉 Returned data depends on:

• the requested scopes
• the LINLP configuration
• the user’s consent

See: Scopes and Claims

LINLP is used for scenarios requiring a high level of trust:

• secure account creation
• strong authentication (2FA)
• user re-authentication
• access to sensitive services

Examples:

• public services
• financial services
• regulated platforms

Two environments are available:

👉 Each environment requires dedicated credentials.

LINLP is based on recognized standards:

• OpenID Connect
• OAuth 2.0

The service provides:

• secure tokens (signed JWTs)
• strong authentication
• a user consent mechanism

👉 LINLP operates within a high-security framework suitable for sensitive use cases.

LINLP is a solution for:

• strong authentication
• based on a previously verified identity
• enabling simple and secure identity reuse

To integrate LINLP:

• Define prerequisites
• Understand OpenID Connect