A feature on Apple’s just-released iPhone 5S has renewed interest in and debate about biometric scanning. The iPhone includes a fingerprint scanner called Touch ID built into the device’s Home button which can be used to unlock the phone or make iTunes purchases.
Fingerprint scanners are just one kind of technology for biometric scanning or authentication. There are also iris and retina scanners, technology that scans a body or face to identify a person, voice-recognition systems and, of course, forensic technology that can identify a person by their DNA.
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