reCAPTCHA: A Spam Filter With a Purpose
CAPTCHA: Completely Automated Public Turing Test to Tell Computers and Humans Apart That’s quite a mouthful, but even if you’ve never seen heard of a CAPTCHA before, I can guarantee you’ve used one. Here’s CAPTCHA image I swiped from Yahoo’s email sign-up page: Yup, those terrible things! I don’t know about you, but I have [...]
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