21 search results - page 1 / 5 » Machine learning attacks against the Asirra CAPTCHA |
SOUPS
2009
ACM
13 years 11 months ago
2009
ACM
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...
SAC
2010
ACM
13 years 11 months ago
2010
ACM
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...
CCS
2010
ACM
13 years 4 months ago
2010
ACM
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...
HIP
2005
Springer
13 years 10 months ago
2005
Springer
Efforts to defend against automated attacks on e-commerce services have led to a new security protocol known as a CAPTCHA, a challenge designed to exploit gaps in the perceptual a...
CCS
2008
ACM
13 years 6 months ago
2008
ACM