Which biometric authentication method has been most widely adopted by government agencies worldwide for citizen identity verification in digital services?

The digital transformation of government services has revolutionized how citizens interact with public institutions. Identity verification systems are at the core of this transformation, allowing secure access to government portals, benefits applications, and official documents. How well do you understand the cutting-edge technologies governments are adopting to enhance citizen experience while maintaining security?

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Fingerprint recognition
Facial recognition
Iris scanning
Voice pattern analysis