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» Machine learning attacks against the Asirra CAPTCHA
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SOUPS
2009
ACM
9 years 2 months ago
Machine learning attacks against the Asirra CAPTCHA
The ASIRRA CAPTCHA [6], recently proposed at ACM CCS 2007, relies on the problem of distinguishing images of cats and dogs (a task that humans are very good at). The security of AS...
Philippe Golle
SAC
2010
ACM
9 years 3 months ago
CAPTCHA smuggling: hijacking web browsing sessions to create CAPTCHA farms
CAPTCHAs protect online resources and services from automated access. From an attacker’s point of view, they are typically perceived as an annoyance that prevents the mass creat...
Manuel Egele, Leyla Bilge, Engin Kirda, Christophe...
ACSAC
2015
IEEE
3 years 4 months ago
Emerging Image Game CAPTCHAs for Resisting Automated and Human-Solver Relay Attacks
CAPTCHAs represent an important pillar in the web security domain. Yet, current CAPTCHAs do not fully meet the web security requirements. Many existing CAPTCHAs can be broken usin...
Song Gao, Manar Mohamed, Nitesh Saxena, Chengcui Z...
CCS
2010
ACM
8 years 8 months ago
Attacks and design of image recognition CAPTCHAs
We systematically study the design of image recognition CAPTCHAs (IRCs) in this paper. We first review and examine all IRCs schemes known to us and evaluate each scheme against th...
Bin B. Zhu, Jeff Yan, Qiujie Li, Chao Yang, Jia Li...
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