If you design a barebone registration form which only requires email address and password as essentials can you omit the password repetition and captcha without too much technical trouble? I ...
I have been looking at ways to prevent spam bots from posting, regstering and performing actions on my site. Initially, I thought about implementing ReCAPTCHA using its API. However, I have found ...
I've just heard about "Asirra" and tried it. But, I am a little bit confusing about using. What is your choice for usability? Asirra or CAPTCHA, and why?