Biometrics uses unique physical or behavioral characteristics — fingerprints, facial recognition, iris scans, voice patterns — to authenticate users.
⚙️ How Does It Work?
A biometric sensor captures the characteristic, converts it to a mathematical template, and compares it against a stored template. A match grants access.
📍 Where Is It Used?
Mobile device unlock, border control, banking apps, high-security facilities, passwordless authentication.
💡 Real-World Example
A bank customer authenticates to her mobile banking app using Face ID. The phone maps 30,000 facial points and grants access in 0.3 seconds without a password.
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