Spam-resistant forms service

I don't use this myself but I've seen several sites where
captcha service is 
used, basic service is free.  Simply put, you have to type
in text that is 
distorted in a graphic.



From http://captchas.net/
:

Why http://captchas.net?
 This server provides CAPTCHA images you can use in your web
page. CAPTCHA 
images can prevent html-forms or web pages to be used by
robots. 
How does it work?
 A CAPTCHA image shows a random string which the user has to
type to submit a 
form. This is a simple problem for (seeing) humans, but a
very hard problem 
for computers which have to use character recognition,
especially, because 
the displayed string is alienated in a way, which makes it
very hard for a 
computer to decode. For more information see 
http://en.wikip
edia.org/wiki/Captcha. 
Prerequisites?
 To use this technology, your web pages have to be generated
dynamically by 
any programming language like PHP, JSP, Python, ASP, Perl.
To encode the 
password the Message Digest Algorithm MD5 is required. It is
part of most of 
the named languages or can easily be installed.



Thomas

On Monday 19 June 2006 16:57, K.G. Schneider wrote:
> I feel as if I've asked this before some time ago but
can't find the post
> or the responses... and don't remember if the answers
helped... or if it
> was all one dream...
>
> I'm (again) interested in a service we could
use/license that would provide
> us spam-resistant web forms for suggestions, user
comments, etc. I'm not
> interested in an in-house solution-a good canned
solution will do. I gotta
> believe these exist.
>
> Karen G. Schneider
> kgsbluehighways.com
>
> _______________________________________________
> Web4lib mailing list
> Web4libwebjunction.org
> http://lists.we
bjunction.org/web4lib/
_______________________________________________
Web4lib mailing list
Web4libwebjunction.org
http://lists.we
bjunction.org/web4lib/