CAPTCHA

Also known as Completely Automated Public Turing test to tell Computers and Humans Apart, CAPTCHA (Challenge-response test)

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AI overview

A CAPTCHA is a test that asks you to prove you're human by completing a task a computer can't easily do, like reading distorted letters or identifying objects in images. Websites use CAPTCHAs to prevent automated programs from accessing accounts or abusing services.

AI-generated from the Wikipedia summary — may contain errors.