[clue-talk] Graphical challenge

[Greg Knaddison]

On Wed, 16 Mar 2005 12:12:44 -0500, Angelo Bertolli
<angelo at freeshell.org> wrote:
> What do you call those graphical challenges that websites use to prevent
> automated programs from abusing the system?  I want to create one on
> sf.net but I wanted to make sure there aren't already a lot of open
> source implementations out there.
> 


They are called "Turing" tests or CAPTCHAs

http://en.wikipedia.org/wiki/Captcha

http://www.captcha.net/

There are several projects which use these - notably the "blog" and
"wiki" related projects which need to cut down on comment spam.

Greg