Biometric sensors

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Facial recognition sensors Iris scanners Vein recognition sensors Voice recognition sensors Fingerprint sensors

How does palm vein authentication work at an ATM? How does face unlock tell a printed photo from the real thing? What good is template protection if a fingerprint database leaks? How can a sensor tell a live heartbeat from a recorded pulse? What makes vein patterns harder to spoof than fingerprints? How does an ultrasonic fingerprint sensor read through a glass screen? Why is contactless fingerprint capture still rare on phones? Why do iris scanners need near-infrared light? Can a 3D printed fingerprint mold fool a capacitive sensor? Why does a fingerprint sensor stop working after a screen replacement? Why do optical in-display fingerprint readers fail on wet fingers? What false acceptance rate do banks actually tolerate for biometric login? Does a scratched sensor hurt false rejections more than false acceptances? How much does sweaty or dry skin shift a capacitive fingerprint reading?

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