Luis von Ahn Manuel Blum David Abraham Michael Crawford Ben Maurer Colin McMillen Harshad Bhujbal Edison Tan reCAPTCHA Inc.[1] is a CAPTCHA system owned by Google. It enables web hosts to distinguish between human and automated access to websites. The original version asked users to decipher hard-to-read text or match images. Version 2 also asked users to decipher text or match images if the analy
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