Unobtrusive and flexible spam protection for Rails apps

Invisible Captcha provides different techniques to protect your application against spambots.The main protection is a solution based on the honeypot principle, which provides a better user experience since there are no extra steps for real users, only for the bots.Essentially, the strategy consists on adding an input field honey_pot into the form that:shouldn't be visible by the real usersshould be left empty by the real userswill most likely be filled by spam botsIt also comes with a time-sensitive hourglass form submission.