CAPTCHA A ColdFusion Tag And .NET Code
The aim of a CAPTCHA is to create and grade tests that a human can easily pass
but a computer program cannot. One aim being to help deter the ongoing scourge of Spam. There any many sites out on the Internet that use a CAPTCHA facility to create an image with a random string that has a weird font and which is then overlaid with another image to foil OCR readers, Ticketmaster for instance. We have been researching CAPTCHA’’s recently and found the following information which may be of help to others: -
The main CAPTCHA project web site
A .NET code example to create a CAPTCHA
A CFX tag to generate a CAPTCHA at emerle.net
We have not tried any of these in production yet but as we say are pointing to them in case they are useful
to others.
You can also do this without a CFC. PaintedWord, a CFC http://tinyurl.com/2r253 from CFMentor.com and you can view a demo here http://tinyurl.com/47h9b . You might want to use Google’s language services to translate the site from Italian to English.
Comment by David — July 29, 2004 @ 12:00 am
Thank you for this information David, hopefully others can benefit from this also.
Comment by Mike Brunt — July 31, 2004 @ 12:00 am