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Re: CAPTCHAs – Understanding CAPTCHA-Solving Services in an Economic Context Marti Motoyama, Kirill Levchenko, Chris Kanich, Damon McCoy, Geoffrey M. Voelker and Stefan Savage University of California, San Diego {mmoto
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Document Date: 2015-11-03 22:04:47
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Re: CAPTCHAs – Understanding CAPTCHA-Solving Services in an Economic Context Marti Motoyama, Kirill Levchenko, Chris Kanich, Damon McCoy, Geoffrey M. Voelker and Stefan Savage University of California, San Diego {mmoto