TechDex Guestbook is a very simple guestbook application and has much needed security features that allow you to ban ip addresses, email addresses, ban keywords that will stop a message from being posted, and profanity filter that scrambles words you select from being readable if posted. Installation is very simple. Very little modifications needed and there are only 4 files. NEW FEATURE!!! To curb the majority of spam attempts new security measures have been set up. First, users must verify responses by email confirmation before responses are shown, and secondly, no one can post responses using your email address. This, coupled with CAPTCHA has created a very strong security base.