Biometric security uses physical attributes such as fingerprints, palm veins, eyes, face, and voice to uniquely identify individuals, often for security purposes. Main biometric security systems include fingerprint readers, palm vein scanners, eye/retinal scanners, and facial and vocal recognition software. Fingerprint reading and palm vein scanning systems are compared based on factors like cost, accuracy, and difficulty to forge. Biometric security has applications in physical security, computer login, work access control, file access, ID verification, data encryption, and potential future uses like biometric digital wallets.
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