Fingerprint authentication is the most widely deployed biometric. Security extends beyond the sensor to template protection, liveness detection, and secure matching.
Sensor Types
Ultrasonic provides highest security with 3D imaging. Capacitive detects live fingers. Optical requires additional liveness measures.
Template Security
Use secure elements (TEE, Secure Enclave) for template storage. Encrypt with user keys. Consider FHE for server-based matching.
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