The predominant Captcha for eliminating form spam is “reCaptcha.” This works great on a blog but requires knowledge of Perl programming for simple HTML programmers such as myself. ReCaptcha is nice in that it helps to digitize books one word at a time whenever a person enters text. I was not able to implement it onto my site – even with the help of my programming tutor.

An easier to implement Captcha is “Snaphost.” This doesn’t digitize book but it does the same thing with a graphical key needed to submit a form. It’s free and no registration is required. Snaphost generates a new code each time using their servers. Plus, snaphost provides forms complete with javascript for varification. It doesn’t get any easier than snaphost. For the Captcha without ads a person can upgrade to the paid account.

Wikipedia cites the meaning of a captcha below:

The term “CAPTCHA” (based upon the word capture) was coined in 2000 by Luis von Ahn, Manuel Blum, Nicholas J. Hopper, and John Langford (all of Carnegie Mellon University). It is a contrived acronym for “Completely Automated Public Turing test to tell Computers and Humans Apart.”