Graphical Text Images for Web Forms

[Freehold Fred]

I don't remember if I ask this here before or not.

BG: MS Frontpage 2000/2002.
Web Forms
Emailed upon Submit

I have forms on several websites that are being hit by web robots. Result is scores of bogus emails delivered to In Box as posted data on website.

I have seen graphical text images, whereby the user is asked to type in the confirming text before finalizing the processing.

Where can I find this code?

[Dudeking]

http://recaptcha.net/plugins/php/

That's great if your using php

[Terry Hanushek]

Fred

Those images are called captchas (for Completely Automated Turing Test To Tell Computers and Humans Apart)

You can get general information and several sources (including recaptcha.net that Eddie referenced) at he official Captcha site (http://www.captcha.net/)

We recently had a problem with automated sign-ups here at KH and had to upgrade our image processing to repel them.

Terry

[PeteF]

Fred,
How smart are these webform bots?
Are they smart enough to select a required input from a dropdown box
such as the "Category" in the example form below?

http://www.westhost.com/contactus.html


What I have in mind is a form that requires the user to select one item
in a dropdown. For example, you ask them to select the correct answer
to Q: Who is President of the USA? In the drop down are 10 possible
answers as follows:

Wrong_01
Wrong_02
Wrong_03
Wrong_04
GEORGE BUSH
Wrong_06
Wrong_07
Wrong_08
Wrong_09
Wrong_10

I'm thinking that this method ought to cut down on BOTs
gettng through by a factor of 10. Do you think it's feasible?

---pete---

[PeteF]

I just did some searching for anyone more comfortable with PERL, as opposed
to PHP. The link below is a sample of reCAPTCHA implemented with PERL.

http://search.cpan.org/~andya/Captcha-reCAPTCHA-v0.7/

---pete---

[Freehold Fred]

Thanks guys! This will keep me busy for the rest of the summer :-)

[Tortanick]

That question one is sweet!