Shortcomings in CAPTCHA Design and Implementation: Captcha2, a Commercial Proposal

Carlos Javier Hernández Castro, Jonathan D. Stainton-Ellis, Arturo Ribagorda, Julio César Hernández Castro. Shortcomings in CAPTCHA Design and Implementation: Captcha2, a Commercial Proposal. In Udo Bleimann, Paul Dowland, Steven Furnell, Oliver Schneider, editors, Eighth International Network Conference (INC 2010), Heidelberg, Germany, July 6-8, 2010. Proceedings. pages 159-168, University of Plymouth, 2010. [doi]

Abstract

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