Heuristics for the Evaluation of Captchas on Smartphones

dc.contributor.author	Reynaga, Gerardo
dc.contributor.author	Chiasson, Sonia
dc.contributor.author	van Oorschot, Paul C.
dc.date.accessioned	2015-07-30T20:55:58Z
dc.date.accessioned	2015-07-30T23:05:08Z
dc.date.available	2015-07-30T20:55:58Z
dc.date.available	2015-07-30T23:05:08Z
dc.date.issued	2015
dc.description.abstract	Captchas are used as a security mechanism on the web to distinguish human users from automated programs. However, existing captchas are not well-adapted to mobile devices and may lead users to abandon tasks. Although Web developers have many available captchas, they lack the tools to evaluate if these captchas are suitable for their mobile site. In this paper, we present domain specific usability heuristics for evaluating captchas on smartphones. To assess effectiveness, we compared our proposed heuristics against Nielsen's during evaluations of four captcha schemes on smartphones. The custom heuristics revealed more major problems and more detailed feedback on the problems than Nielsen's.	en_US
dc.description.refereed	Yes	en_US
dc.identifier.doi	10.1145/2783446.2783583
dc.identifier.uri	http://hdl.handle.net/1880/50533
dc.identifier.uri	http://hdl.handle.net/1880/50789
dc.publisher	ACM	en_US
dc.publisher.url	http://dx.doi.org/10.1145/2783446.2783583	en_US
dc.title	Heuristics for the Evaluation of Captchas on Smartphones	en_US
dc.type	unknown