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"Shortcomings in CAPTCHA Design and Implementation: Captcha2, a Commercial ..."
Carlos Javier Hernández-Castro et al. (2010)
- Carlos Javier Hernández-Castro, Jonathan D. Stainton-Ellis, Arturo Ribagorda, Julio César Hernández Castro:

Shortcomings in CAPTCHA Design and Implementation: Captcha2, a Commercial Proposal. INC 2010: 159-168

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