Making CAPTCHAs clickable

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Making CAPTCHAs clickable
We show how to convert regular keyboard-entry CAPTCHAs into clickable CAPTCHAs. The goal of this conversion is to simplify and speed-up the entry of the CAPTCHA solution, to minimize user frustration and permit the use of CAPTCHAs on devices where they would otherwise be unsuitable. We propose a technique for producing secure clickable CAPTCHAs that are well suited for use on cell phones and other mobile devices. We support the practical viability of our approach by results from a user study, and an analysis of its security guarantees. Categories and Subject Descriptors K.6.5 [Computing Milieux]: Management of Computing and Information Systems—Security and Protection General Terms Security, Human Factors Keywords CAPTCHA, reverse Turing test, usability, mobile devices.
Richard Chow, Philippe Golle, Markus Jakobsson, Lu
Added 01 Jun 2010
Updated 01 Jun 2010
Type Conference
Year 2008
Authors Richard Chow, Philippe Golle, Markus Jakobsson, Lusha Wang, XiaoFeng Wang
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