A Spelling Based CAPTCHA System by Using Click

Kuo-Feng Hwang, Cian-Cih Huang, Geeng-Neng You. A Spelling Based CAPTCHA System by Using Click. In 2012 International Symposium on Biometrics and Security Technologies, ISBAST 2012, Taipei, Taiwan, March 26-29, 2012. pages 1-8, IEEE Computer Society, 2012. [doi]

Abstract

Abstract is missing.