This is the homepage of the Shape Contexts based approach to break Gimpy, the CAPTCHA test used at Yahoo! to screen out bots. Our method can successfully pass that test 92% of the time. See EZ-Gimpy in action at Yahoo! The approach we take uses general pu
B. Zhu, J. Yan, Q. Li, C. Yang, J. Liu, N. Xu, M. Yi, und K. Cai. CCS '10: Proceedings of the 17th ACM conference on Computer and communications security, Seite 187--200. New York, NY, USA, ACM, (Oktober 2010)