From handwritten CAPTCHAs to 'smart rooms,' tech solutions start with pattern recognition

Buy something online, enter your credit card number and mailing address. Simple. Then you come to the box with the CAPTCHA, the "completely automated public Turing test to tell computers and humans apart." Here, the website attempts to confirm that you're a human, not some robot about to commit a cybercrime. Biometrics that researchers are studying for "smart room" applications, beyond CAPTCHAS and handwritten words include hand gestures as well as the more common biometrics of facial, voice and gait recognition.

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