Breaking Randomized Linear Generation Functions Based Virtual Password System

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Li_4_ICC2010.pdf
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2010
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Khayam, Syed Ali
Sadeghi, Ahmad-Reza
Schmitz, Roland
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2010 IEEE International Conference on Communications. IEEE, 2010, pp. 1-6. ISBN 978-1-4244-6402-9. Available under: doi: 10.1109/ICC.2010.5502416
Zusammenfassung

In ICC2008 and subsequent work, Lei et al. proposed a user authentication system (virtual password system), which is claimed to be secure against identity theft attacks, including phishing, keylogging and shoulder surfing. Their authentication system is a challenge-response protocol based on a randomized linear generation function, which uses a random integer in the responses of each login session to offer security against assorted attacks. In this paper we show that their virtual password system is insecure and vulnerable to multiple attacks. We show that with high probability an attacker can recover an equivalent password with only two (or a few more) observed login sessions. We also give a brief survey of the related work and discuss the main challenges in designing user authentication methods secure against identity theft.

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ICC 2010 - 2010 IEEE International Conference on Communications, 23. Mai 2010 - 27. Mai 2010, Cape Town, South Africa
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ISO 690LI, Shujun, Syed Ali KHAYAM, Ahmad-Reza SADEGHI, Roland SCHMITZ, 2010. Breaking Randomized Linear Generation Functions Based Virtual Password System. ICC 2010 - 2010 IEEE International Conference on Communications. Cape Town, South Africa, 23. Mai 2010 - 27. Mai 2010. In: 2010 IEEE International Conference on Communications. IEEE, 2010, pp. 1-6. ISBN 978-1-4244-6402-9. Available under: doi: 10.1109/ICC.2010.5502416
BibTex
@inproceedings{Li2010-05Break-6389,
  year={2010},
  doi={10.1109/ICC.2010.5502416},
  title={Breaking Randomized Linear Generation Functions Based Virtual Password System},
  isbn={978-1-4244-6402-9},
  publisher={IEEE},
  booktitle={2010 IEEE International Conference on Communications},
  pages={1--6},
  author={Li, Shujun and Khayam, Syed Ali and Sadeghi, Ahmad-Reza and Schmitz, Roland}
}
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