Corpus ID: 10823289

The Robustness of Google CAPTCHAs

@inproceedings{Ahmad2011TheRO,
  title={The Robustness of Google CAPTCHAs},
  author={A. E. Ahmad and Jeff Yan and Mohamad Tayara},
  year={2011}
}
We report a novel attack on two CAPTCHAs that have been widely deployed on the Internet, one being Google's home design and the other acquired by Google (i.e. reCAPTCHA). With a minor change, our attack program also works well on the latest ReCAPTCHA version, which uses a new defence mechanism that was unknown to us when we designed our attack. This suggests that our attack works in a fundamental level. Our attack appears to be applicable to a whole family of text CAPTCHAs that build on top of… Expand

Figures and Tables from this paper

A Simple Generic Attack on Text Captchas
Character Segmentation for Automatic CAPTCHA Solving
A CAPTCHA Scheme Based on the Identification of Character Locations
How to Break CaptchaStar
Automatic Identification of CAPTCHA Schemes
Recognition of merged characters in text based CAPTCHAs
Contributions to Text-based CAPTCHA Security
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 15 REFERENCES
The robustness of a new CAPTCHA
A low-cost attack on a Microsoft captcha
Attacks and design of image recognition CAPTCHAs
Breaking Visual CAPTCHAs with Naive Pattern Recognition Algorithms
  • Jeff Yan, A. E. Ahmad
  • Computer Science
  • Twenty-Third Annual Computer Security Applications Conference (ACSAC 2007)
  • 2007
Evaluating the usability and security of a video CAPTCHA
Machine learning attacks against the Asirra CAPTCHA
  • P. Golle
  • Computer Science
  • IACR Cryptol. ePrint Arch.
  • 2008
Building Segmentation Based Human-Friendly Human Interaction Proofs (HIPs)
Captcha Robustness: A Security Engineering Perspective
...
1
2
...