12 search results - page 2 / 3 » Attacks and design of image recognition CAPTCHAs |
CVPR
2003
IEEE
14 years 6 months ago
2003
IEEE
In this paper we explore object recognition in clutter. We test our object recognition techniques on Gimpy and EZGimpy, examples of visual CAPTCHAs. A CAPTCHA ("Completely Au...
CORR
2011
Springer
12 years 8 months ago
2011
Springer
- Vulnerabilities related to weak passwords are a pressing global economic and security issue. We report a novel, simple, and effective approach to address the weak password probl...
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...
HIP
2005
Springer
13 years 10 months ago
2005
Springer
A CAPTCHA which humans find to be highly legible and which is designed to resist automatic character–segmentation attacks is described. As first detailed in [BR05], these ‘Sc...
ICDAR
2005
IEEE
13 years 10 months ago
2005
IEEE
The ScatterType CAPTCHA, designed to resist character– segmentation attacks and shown to be highly legible to human readers, is analyzed for vulnerabilities and is offered for e...