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Date: 2008-03-25 13:34:39Security Computing Human-based computation Reverse Turing test Luis von Ahn Turing test Optical character recognition Clickable Computer security Artificial intelligence Alan Turing CAPTCHA | Making CAPTCHAs Clickable Richard Chow Philippe Golle Markus JakobssonAdd to Reading ListSource URL: crypto.stanford.eduDownload Document from Source WebsiteFile Size: 176,43 KBShare Document on Facebook |