Honeypot Captcha against Spam bots
Remya Vinayakumar · International Journal for Research in Applied Science and Engineering Technology · 2018
The Invisible Captcha control plays upon the fact that most comment spam bots don't evaluate JavaScript. However, there's another behavioural trait that bots have that can be exploited due to the bots inability to support another browser facility. When spam bots encounter a form field, they go into berserker frenzy try to fill out each field. At the same time, spam bots tend to ignore CSS. A honey pot is a field added to the form that the users can't see due to CSS or JavaScript (which hides the field). They don't inconvenience users like a captcha and they are a valid tool for thwarting spam bots. Basically, a spam bot fills in a field that valid users can't see, alerting us to their activity. If the honey pot field is filled in we can confidently reject the form as spam.