Double word captchas are called recaptchas. One word is random, to check if you are human. The other word is asking you to interpret a printed word that computers can't decipher, to help digitize old books. I heard this on a Ted X talk. https://www.ted.com/talks/luis_von_ahn_massive_scale_online_collaboration?language=en
I had this yesterday. I doubt any human could read that!
As my friend Niklas Bjornerstedt tweeted
http://www.google.com/recaptcha/learnmore
ReplyDeleteDouble word captchas are called recaptchas. One word is random, to check if you are human. The other word is asking you to interpret a printed word that computers can't decipher, to help digitize old books. I heard this on a Ted X talk. https://www.ted.com/talks/luis_von_ahn_massive_scale_online_collaboration?language=en
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