Research Article
A User-friendly CAPTCHA Scheme Based on Usability Features
Department of Computer System and Communication, Faculty of Computer Science and Information Systems, Universiti Teknologi Malaysia, Skudai, 81310 Johor, Malaysia
Seyedkaveh Ranjbar
Department of Computer Science, Faculty of Computer Science, Shiraz University, Shiraz, Fars, Iran
Mohammad Hashemi
Department of Computer System and Communication, Faculty of Computer Science and Information Systems, Universiti Teknologi Malaysia, Skudai, 81310 Johor, Malaysia