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Introduction

Selfie Check uses the user’s mobile device camera for liveness and facial similarity checks. It adds friction against automated and repeated account creation without requiring a Proof of Human. Unlike high-assurance Orb verification, Selfie Check does not provide a strict one-person-one-account guarantee. Use Selfie Check for:
  • Liveness detection: Confirm the user is a real person, not a spoof or injection attack.
  • Sybil resistance: Make mass account creation harder through facial similarity checks.
  • Continuity: Confirm a returning user is the same person who originally enrolled.
Anyone with World App can use Selfie Check. No Orb, passport or other prerequisite credential is required.

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How it works

Use IDKit to integrate Selfie Check into your application.
  • On mobile (iOS/Android): Use IDKit to generate a deep link and attach it to a “Verify” CTA. When the user taps it, they are redirected to World App to complete Selfie Check.
  • On desktop: Use IDKit to generate a QR code and display it to the user. When the user scans it with their mobile device camera, World App launches and guides them through Selfie Check.

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User Experience Flow

  1. Challenge: The user initiates the flow on your app (Relying Party).
  2. Hand-off: The user is redirected to World App. If they don’t have World App installed, they are guided to download it and go straight into the Selfie Check experience.
  3. Enrollment/Auth:
    • New User: Prompts to “Take a selfie”, then runs a liveness check and a uniqueness check against other faces.
    • Returning User: Runs a quick Face Auth to verify continuity.
  4. Success: The user returns to your application with a verified credential.

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Next steps

See Web Integration Guide. Testing your integration? See Testing Selfie Check in Sandbox for coverage, critical user journeys, and known limitations.