atitan

Math Quiz generates dynamic math problem in the comment form to beat spam robots and supports flexible form style customization.
Demo website: https://atifans.net/ (with Supercache and AJAX comment form enabled)
For PayPal donation, please use this email address: info a.t atifans.net
Features:
<ul>
<li>Dynamic problems prevent spam robots from posting unwanted content.</li>
<li>Quiz form inserted using AJAX for better compatibility with HTML cache plugins.</li>
<li>Form style and position can be customized in the control panel.</li>
<li>Trackbacks and Pingbacks are checked with DNS queries to avoid abuse.</li>
<li>Optional login page protection.</li>
</ul>
Translators:
<ul>
<li>SLV-es (Spanish)</li>
<li>Joao Paulo (Portuguese)</li>
</ul>

Math Quiz

Math Quiz generates dynamic math problem in the comment form to beat spam robots.

IceCaptcha

The new generation “IceCaptcha” plugin.
The new security system presupposes clicking on the circle of a particular color instead of entering numbers or other redundant actions. It is done instead of clicking on the button, i.e. no spare action is required!
As for the bots or foreign captcha entering services, the task practically can’t be solved as the circle is drawn randomly in various places, it is of random color and the background (the picture itself) is also different every time. The click spot coordinates are encrypted and sent to the server where the checkup is performed. This all brings us to the fact that there is no chance of switching or calculating the correct result for any third party software.
You can use our captcha for: • Registering new users • Authenticating users • Commenting anti spam security

This is the new generation IceCaptcha plugin. The Anti-Spam security system misses no bots and does not disturb a human being.

Math Quiz vs IceCaptcha