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34

ISW
2004
Springer

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Image Recognition CAPTCHAs

14 years 4 months ago

Image Recognition CAPTCHAs

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CAPTCHAs are tests that distinguish humans from software robots in an online environment [3, 14, 7]. We propose and implement three CAPTCHAs based on naming images, distinguishing images, and identifying an anomalous image out of a set. Novel contributions include proposals for two new CAPTCHAs, the ﬁrst user study on image recognition CAPTCHAs, and a new metric for evaluating CAPTCHAs.

Monica Chew, J. D. Tygar

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Captchas | Image Recognition Captchas | ISW 2004 | ﬁrst User Study |

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Added	02 Jul 2010
Updated	02 Jul 2010
Type	Conference
Year	2004
Where	ISW
Authors	Monica Chew, J. D. Tygar

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