In 2000, Luis von Ahn and his team introduced CAPTCHA to help websites distinguish humans from bots

Carnegie Mellon University researchers pioneered CAPTCHA, a system to differentiate humans from bots, revolutionizing web ...
Android

Google reCAPTCHA May Soon Ask You for Hand Gestures to Verify Your 'Humanity'

Google is testing a new reCAPTCHA check that uses hand gestures for verification purposes. It’ll ask users to perform simple hand gestures in front of the webcam. The system analyzes them to confirm ...