Biometric Authentication: A Complete Implementation Guide

Biometric authentication uses unique physical characteristics to verify identity. When implemented correctly, it offers stronger security than passwords while improving user experience.

Biometric Modalities

• Fingerprint: Most widely deployed, well-understood
• Face: Contactless, increasingly accurate
• Iris: Highly unique, stable over time
• Voice: Convenient for phone-based verification

Security Considerations

Use FHE-protected matching for maximum security. Implement liveness detection to prevent spoofing. Combine with other factors for high-assurance scenarios.

H33 achieves 99.7% accuracy with FAR < 0.001%, processing in 1.28ms with full privacy protection through FHE-encrypted matching.