A
CAPTCHA is a type of challenge-response test
used to determine whether a
user is human. Because
a computer program is unable to solve the
CAPTCHA, any user entering a correct solution is
presumed to be human.
That being said, how many
times have you gone to a site only to be
presented with a CAPTCHA
image so distorted that it took you 3 tries just
to get by it? How many times have you said the
hell with it and just
left the site? The problem is that the OCR
systems used by the automated systems are getting
better and better and the images we humans are
expected to recognize are getting more and more
difficult to make out.
Well, instead of relying on
distorted images that are hard for even a human
to read I decided to create a CAPTCHA
system that is extremely easy for a human to
deal with yet very difficult for an automated
computer program to sort out. My system uses no
distorted
image, but instead tests you in a more human
way. In addition to that (http referrer checks), (iframes), (randomization), and
(color shuffling) are utilized to
prevent bots from being able to solve the test.
The best part is that this system is Pure ASP
code and no special components are needed on the
server. You can add the
CAPTCHA to your existing
forms and start enjoying less spam submissions
right away. |
Mini Version Screenshot..
Click here to try the
Demo
Captcha
Be sure to
click refresh and notice how the color locations
shuffle. The color you are asked for also
changes.
This code works perfectly with
ASPProtect and our
FREE Contact Form Downloads. We have
directions on how to use it with all three of
them in our
Support
Forums. |
