Captcha - Stop spam on your blog, forum or any PHP based websites
A CAPTCHA (IPA: /?kęp?t??/) is a type of challenge-response test used in computing to determine whether the user is human. “CAPTCHA” is a contrived acronym for “Completely Automated Public Turing test to tell Computers and Humans Apart”, trademarked by Carnegie Mellon University. A CAPTCHA involves one computer (a server) which asks a user to complete […]
Posted on October 9th, 2007 by Ita
Filed under: PHP, Web Security | No Comments »