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ArtistServer has added a CAPTCHA challenge-response system to the various forms where people can either contact it's members or post replies to blog posts. With CAPTCHA, we can now block the multitude of spammers and spam bots who crawl the Web looking for Web forms.

The following text comes from: http://lyla.maestropublishing.com

What is a Captcha?

A Captcha is a type of challenge-response test used to determine whether or not a user is human. A common type of Captcha requires the user to enter the correct string of characters that have been distorted in an image. A Captcha can also be an response to a question that most people should be able to answer.

What does Captcha stand for?

Alan Turning described challenge-response tests in a paper he wrote in 1950. Computer scientists at Carnegie Mellon University and IBM coined the term in 2000. Captcha is an acronym for "completely automated public Turing test to tell computers and humans apart." In 1997 Alta Vista developed the modern-day Captcha to prevent bots from adding URLs to search engines. The rest is history.

For those who want to know how I set this up, I used LylaCAPTCHA for ColdFusion - which is an open source project built from another open source project from: http://www.compoundtheory.com. In only took a few hours to add to integrate the code into the site and add to the various forms we needed it on.

Thanks goes out to: Peter J. Farrell and Mark Mandel - the developers of this CAPTCHA solution.