Graphic image script for messages

[Scrounger]

I'm not sure of the official name but I need to figure out how to have a image generated and entered before you can send a message or a feedback on my website to cut down on the spammers.

The pages are

http://www.cubpack88.org/mailinglist.asp

and

http://www.cubpack88.org/feedback_pack88.htm

Thanks.

Matthew

[Twey]

It's called a CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart).

They're very difficult to do well. Read the PWNtcha FAQ for some common mistakes made when doing image CAPTCHAs. Also, don't forget that you need an audio equivalent for those who can't see images for whatever reason, which needs to be equally hard to break (no point having a strong image CAPTCHA if the audio version is easily broken).

Depending on what server-side language(s) and features you have installed, you might want to look into GD (PHP), PIL (Python), rmagick (Ruby), ImageMagick (generic, command-line), or System.Drawing (ASP.NET).