PWNtcha stands for "Pretend We’re Not a Turing Computer but a Human Antagonist", as well as PWN capTCHAs. This project’s goal is to demonstrate the inefficiency of many captcha implementations.
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
The purpose of the simple java captcha project is to make it easy to generate good-looking captchas with a minimum of programming and preferably little configuration. SimpleCaptcha is an open Source Java implementation for captcha creation. Integration is
B. Zhu, J. Yan, Q. Li, C. Yang, J. Liu, N. Xu, M. Yi, and K. Cai. CCS '10: Proceedings of the 17th ACM conference on Computer and communications security, page 187--200. New York, NY, USA, ACM, (October 2010)