The robustness of a new CAPTCHA

El, A. S., Yan, J. & Marshall, L., 2010, Proceedings of the 3rd European Workshop on System Security, EUROSEC'10. New York: ACM, p. 36-41 6 p.

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

Bot, cyborg and automated turing test: (or "putting the humanoid in the protocol")

Yan, J., 2009, Security protocols: 14th International Workshop, Cambridge, UK, March 27-29, 2006, Revised Selected Papers. Christianson, B., Crispo, B., Malcolm, J. A. & Roe, M. (eds.). Berlin: Springer Verlag, p. 190-197 8 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 5087 ).

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

Magic Bullet: a dual-purpose computer game

Yan, J. & Yu, S., 2009, HCOMP '09 Proceedings of the ACM SIGKDD Workshop on Human Computation. New York: ACM, p. 32-33 2 p. 1600161

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

Streamlining attacks on CAPTCHAs with a computer game

Yan, J. & Yu, S. Y., 2009, IJCAI--09, proceedings of the Tweny-First International Joint Conference on Artificial Intelligence: Pasadena, California, USA, 11-17 July 2009. Menlo Park, Calif.: AAAI, p. 2095-2100 6 p.

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

A low-cost attack on a Microsoft captcha

Yan, J. & El Ahmad, A. S., 2008, Proceedings of the 15th ACM conference on Computer and communications security - CCS '08. New York: ACM, p. 543-554 12 p.

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

Usability of CAPTCHAs or usability issues in CAPTCHA design

Yan, J. & El Ahmad, A. S., 2008, SOUPS 2008 - Proceedings of the 4th Symposium on Usable Privacy and Security. New York: ACM, p. 44-52 9 p.

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

Breaking visual CAPTCHAs with naive pattern recognition algorithms

Yan, J. & El Ahmad, A. S., 12/2007, Twenty-Third Annual Computer Security Applications Conference (ACSAC 2007). IEEE, p. 279-291 13 p.

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter

Do background images improve "draw a secret" graphical passwords?

Dunphy, P. & Yan, J., 2007, CCS '07 Proceedings of the 14th ACM conference on Computer and communications security - CCS '07. New York: ACM, p. 36-47 12 p.

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review