reCAPTCHA is a CAPTCHA system, that is a system that allows 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.
- Original authors: Luis von Ahn; Ben Maurer; Colin McMillen; Harshad Bhujbal; Manuel Blum
- Developer: Google
- Initial release: May 27, 2007
ReCAPTCHA logo svg