Publikation:

Breaking e-Banking CAPTCHAs

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ACSAC2010_Full.pdf
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Datum

2010

Autor:innen

Shah, Syed Amier Haider
Khan, Muhammad Asad Usman
Khayam, Syed Ali
Sadeghi, Ahmad-Reza
Schmitz, Roland

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-127806
DOI (zitierfähiger Link)
https://doi.org/10.1145/1920261.1920288
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Informatik und Informationswissenschaft: Publikationen
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Beitrag zu einem Konferenzband
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Published

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Proceedings of the 26th Annual Computer Security Applications Conference on - ACSAC '10. New York, New York, USA: ACM Press, 2010, pp. 171-180. ISBN 978-1-4503-0133-6. Available under: doi: 10.1145/1920261.1920288

Zusammenfassung

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 prevent malicious manipulation of e-banking transactions by automated Man-in-the-Middle (MitM) attackers. Despite serious financial risks, security of e-banking CAPTCHAs is largely unexplored. In this paper, we report the first comprehensive study on e-banking CAPTCHAs deployed around the world. A new set of image processing and pattern recognition tech- niques is proposed to break all e-banking CAPTCHA schemes that we found over the Internet, including three e-banking CAPTCHA schemes for transaction verification and 41 schemes for login. These broken e-banking CAPTCHA schemes are used by thousands of financial institutions worldwide, which are serving hundreds of millions of e-banking customers. The success rate of our proposed attacks are either equal to or close to 100%. We also discuss possible improvements to these e-banking CAPTCHA schemes and show essential diffculties of designing e-banking CAPTCHAs that are both secure and usable. Based on our results we believe that currently CAPTCHAs are incapable of offering adequate security for high-value applications like e-banking.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
004 Informatik

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Konferenz

The 26th Annual Computer Security Applications Conference on - ACSAC '10, 6. Dez. 2010 - 10. Dez. 2010, Austin, Texas
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ISO 690LI, Shujun, Syed Amier Haider SHAH, Muhammad Asad Usman KHAN, Syed Ali KHAYAM, Ahmad-Reza SADEGHI, Roland SCHMITZ, 2010. Breaking e-Banking CAPTCHAs. The 26th Annual Computer Security Applications Conference on - ACSAC '10. Austin, Texas, 6. Dez. 2010 - 10. Dez. 2010. In: Proceedings of the 26th Annual Computer Security Applications Conference on - ACSAC '10. New York, New York, USA: ACM Press, 2010, pp. 171-180. ISBN 978-1-4503-0133-6. Available under: doi: 10.1145/1920261.1920288
BibTex
@inproceedings{Li2010Break-6246,
  year={2010},
  doi={10.1145/1920261.1920288},
  title={Breaking e-Banking CAPTCHAs},
  isbn={978-1-4503-0133-6},
  publisher={ACM Press},
  address={New York, New York, USA},
  booktitle={Proceedings of the 26th Annual Computer Security Applications Conference on - ACSAC '10},
  pages={171--180},
  author={Li, Shujun and Shah, Syed Amier Haider and Khan, Muhammad Asad Usman and Khayam, Syed Ali and Sadeghi, Ahmad-Reza and Schmitz, Roland}
}
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