Without you necessarily realizing it, your unique attributes — or "biometrics" — are being used to verify your identity.
Every time you unlock your smartphone, use a fingerprint scanner at the airport, or upload a photo with facial recognition to Facebook, your physical attributes are scanned and scrutinized against a template.
The use of biometrics has exploded in recent years, with companies ranging from 24-Hour Fitness to NYU Langone Medical Center using this convenient technology to identify their customers.
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