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The Effectiveness of Intersection Attack Countermeasures for Graphical Passwords
Recognition-based graphical passwords are one of several proposed alternatives to alphanumerical passwords for user authentication. However, there has been limited work on the security of such schemes. Often authors state a possible attack combined with ...
Divide and Conquer: An Efficient Attack on Yahoo! CAPTCHA
CAPTCHA is now almost a standard security technology to tell computers and humans apart. The most widely deployed CAPTCHAs are text-based schemes. In this paper, we document how we have broken such text-based scheme used by Yahoo!. Using "connecting ...
Index Terms
- Proceedings of the 2012 IEEE 11th International Conference on Trust, Security and Privacy in Computing and Communications