Biometric security is the recognition and authentication of individuals based on unique combinations of measurable physical or behavioural characteristics. Examples include fingerprints, iris scanning, face and voice recognition, or hand geometry. All of these biometric techniques are differentiated by speed, durability, reliability, and cost effectiveness. Fingerprints are generally considered the most practical biometric identifier in use today and can be found on a number of PDA (Personal Digital Assistants).
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