ANTI ROBOT VALIDATION CODE OR PROGRAM

HELLO,

   MY COMPANY'S WEB PAGE HAS BEEN HACKED BY SOMEONE AND THEY ARE SENDING HUNDREDS OF SPAM EMAIL USING CONTACT US PAGE. ARE THERE ANY VCODES OR PROGRAMS THAT WE CAN USE SO HUMAN USERS WILL GET A DISTORTED SET OF LETTER AND THEY WILL BE ASKED TO ENTER THAT CODE TO BE VALIDATES.

PLEASE HELP ASAP.

CHEERS.
mepereraAsked:
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CSecurityConnect With a Mentor Commented:
There is a technology called CAPTCHA... User should input a text in a picture that is hidden... You should see that in registartion forms such as in Yahoo! and Hotmail...

There is alot of free source codes for CAPTCHA in any programming language you need... ;)
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KenAdneyCommented:
There's an article in the current eWeek on 'bots which mentions the Intercloud Security Service from Trend Micro.  That's about all I know...
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radnorCommented:
My form is sent back to a PHP script.  In this script I have my "$to" address (my email)  ALL other form fields are scanned for the following "@", "to:", "bcc:", "cc:", etc.  If found they are replaced with something else.  

If someone tries to inject header info, I want to KILL the inserted address BEFORE the mail goes out.

Hope it helps!
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