If you’ve ever logged into a website and needed to identify streetlights, pedestrian crossings, or move puzzle pieces into a picture, you’ve used a CAPTCHA. The tech is designed to keep automated spam requests to access a website out by carrying out a ‘Turing Test’ on the fly. It essentially helps prove that the user is a human and not, as often happens, a bot purchased to constantly request data from a site or test its defenses.
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