A Tech Log

October 6, 2008

reCAPTCHA: a freely available CAPTCHA implementation.

Filed under: Development — adallow @ 5:54 am

From the website: http://recaptcha.net/

A CAPTCHA is a program that can tell whether its user is a human or a computer. You’ve probably seen them — colorful images with distorted text at the bottom of Web registration forms. CAPTCHAs are used by many websites to prevent abuse from “bots,” or automated programs usually written to generate spam. No computer program can read distorted text as well as humans can, so bots cannot navigate sites protected by CAPTCHAs.

  • A registration page for a forum or wiki.
  • A comment form.
  • Hiding information that could be useful to spammers (we recommend the reCAPTCHA Mailhide API for this).

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