HNO Captcha

Licence: GNU General Public License
Requires: ab PHP4 mit GDlib
Description: This captcha wants the user to click on body parts of animals instead of typing text.

» Demo


Captchas are small helpers in websites to differentiate between human users and bots. We take advantage of the human ability to distinguish some body parts from others. This captcha asks users to click on different body parts of animals. You can customize it to use variable count of pictures to increase security. The script dislocates the picture and randomizes the compression factor everytime a new captcha is generated. The script is implemented as a server side imagemap, so you can use this captcha like a submit button in common forms.