The SecureForm plugin allow to protect your joomla forms from spam and bot.

There is much discussion about how to prevent spambots from submitting forms on web sites. A solutions is use a CAPTCHA , a common method of limiting access to services made available over the Web is visual verification of a bitmapped image (Google Yahoo and many others ) use this method. So this plugin give this solution on Joomla forms.

Many people say that  is a classic case where the user and accessibility is deeply impacted. This splution presents a major problem to users who are blind, have low vision, or have a learning disability such as dyslexia. So, a logical means of trying to solve this problem is to offer another non-textual method of using the same content. SecurForm serves a sound file (.mp3) that can be listened to if the visual verification is not suitable for the user.

Tipical Joomla form attacked from spam are contact form