Using Arabic CAPTCHA for Cyber Security. - Bilal Khan; Khaled Alghathbar; Muhammad Khurram Khan; Abdullah M. AlKelabi; Abdulaziz Alajaji (FGIT-SecTech/DRBC, 2010)

Cyber security using arabic captcha scheme. - Bilal Khan; Khaled Alghathbar; Muhammad Khurram Khan; Abdullah M. AlKelabi; Abdulaziz Alajaji (Int. Arab J. Inf. Technol., 2013)