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Final answer:
Biometric identifiers like fingerprints, voice, and facial features are used for device security through biometric authentication, including face recognition and retinal scans.
Explanation:
Biometric identifiers such as fingerprints, voice, and facial features are utilized by device sensors for security purposes. Biometric authentication involves verifying a user's identity based on unique attributes stored in a database and comparing them for access.
Face recognition, a form of biometric authentication, utilizes facial features like skin texture and distances between features to create a mathematical expression for authentication.
Retinal scans are considered highly reliable for authentication due to the uniqueness of an individual's eye structure but may have vulnerabilities if high-quality eye images are used to trick the system.
Learn more about Biometric authentication here:
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