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» Attacks and design of image recognition CAPTCHAs
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ACSAC
2010
IEEE
9 years 6 months ago
Breaking e-banking CAPTCHAs
Many financial institutions have deployed CAPTCHAs to protect their services (e.g., e-banking) from automated attacks. In addition to CAPTCHAs for login, CAPTCHAs are also used to...
Shujun Li, S. Amier Haider Shah, M. Asad Usman Kha...
CCS
2010
ACM
9 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...
ACSAC
2015
IEEE
4 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
9 years 11 months ago
Scene tagging: image-based CAPTCHA using image composition and object relationships
In this paper, we propose a new form of image-based CAPTCHA we term "scene tagging". It tests the ability to recognize a relationship between multiple objects in an imag...
Peter Matthews, Cliff Changchun Zou
SP
2010
IEEE
192views Security Privacy» more  SP 2010»
10 years 2 days ago
How Good Are Humans at Solving CAPTCHAs? A Large Scale Evaluation
—Captchas are designed to be easy for humans but hard for machines. However, most recent research has focused only on making them hard for machines. In this paper, we present wha...
Elie Bursztein, Steven Bethard, Celine Fabry, John...
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