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Date: 2011-12-19 14:24:27Alan Turing CAPTCHA Human-based computation Reverse Turing test Segmentation Transaction authentication number Optical character recognition Turing test Computer security Artificial intelligence Computing Security | ACM Computer and Communication security[removed]CSS’[removed]Text-based CAPTCHA Strengths andAdd to Reading ListSource URL: www.cin.ufpe.brDownload Document from Source WebsiteFile Size: 1,31 MBShare Document on Facebook |