Selfie Biometric Authentication

REL-ID SDK: Server-Side Selfie Biometric Authentication

🔍 Overview

Server-side selfie biometric authentication in REL-ID allows an application to verify a user's identity using their facial biometrics. The biometric matching is done on the server by comparing the captured selfie with the existing template stored securely on the backend.

⚖️ Purpose

• To authenticate a user via live selfie capture and server-side template matching
• Ensure secure biometric verification for login, KYC, or sensitive transactions

📆 Workflow Steps

1. Check for Existing Selfie Template

RdnaClient.checkIDVUserBiometricTemplateStatus();

• Event Triggered: onIDVCheckUserBiometricTemplateStatus
• If the selfie template exists, proceed to next step
• If not, prompt user for biometric opt-in

2. Start Server-Side Authentication

RdnaClient.initiateIDVServerBiometricAuthentication();

• Requests the SDK to initiate selfie authentication
• SDK immediately invokes the event to capture selfie

3. Confirm Selfie Capture Start

• Event Triggered: getIDVSelfieProcessStartConfirmation
• App must show a screen to get user consent to begin selfie capture
• Submit consent using API setIDVSelfieProcessStartConfirmation
• Once user confirms, SDK proceeds with selfie capture

4. Receive Authentication Result

• Event Triggered: onIDVServerBiometricAuthenticationResult
• Contains match result, error codes, and status
• This event is received even if user did not give consent to capture selfie and marks the end of the flow

👁️ UI Screens Shown (SDK)

• Selfie capture screen
• Error/retry screen (on poor quality)
• Status screen with match success/failure