Research Article
CAPTCHA: A Survey of Usability Features
Department of Computer System and Communication, Universiti Teknologi Malaysia Skudai, 81310 Johor, Malaysia
Norafida Ithnin
Department of Computer System and Communication, Universiti Teknologi Malaysia Skudai, 81310 Johor, Malaysia
Mohammad Hashemi
Department of Computer System and Communication, Universiti Teknologi Malaysia Skudai, 81310 Johor, Malaysia