@INPROCEEDINGS{Li:Captchaecker:SOUPS2011b,
  author =       {Maliha Nazir and Yousra Javed and Muhammad Murtaza Khan and Syed Ali Khayam and Shujun Li},
  title =        {Poster: {Captch{\ae}cker} -- Automating Usability-Security Evaluation of Textual {CAPTCHAs}},
  booktitle =    {Proceedings of 7th Symposium On Usable Privacy and Security (SOUPS 2011)},
  year =         {2011},
  publisher =    {ACM},
  note =         {poster available online at \url{http://www.hooklee.com/pub.html}},
}