The Human Check module (HC for short) adds an extra level of automated spam bot protection to your comment and article submission forms. It does this by changing the input form name values to random strings each time you load a page. This makes it difficult for an automated bot to detect and exploit a pattern in your input forms.
The best part about the Human Check module is that regular users will never notice that it is enabled. It doesn’t present any new anti-spam challenges or any other visual cues, making is a must have module for Pligg CMS.