Web Results

CAPTCHA - Wikipedia


A CAPTCHA is a type of challenge-response test used in computing to determine whether or .... Sometimes, if part of the software generating the CAPTCHA is client-side (the validation is done on a se...

Captcha Verification - Qualtrics Support


This Qualtrics support page teaches about the Captcha Verification question type , which asks survey respondents to verify that they are not robots.

The Official CAPTCHA Site


Includes demonstrations, research papers, and news.

The system always shows the error of "CAPTCHA verification failed ...


Nov 19, 2011 ... Question. The system always shows the error of "CAPTCHA verification failed" while the code is right. What is the problem? Solution. First of all ...

Problems viewing or passing CAPTCHA verification | Yahoo Help ...


Yahoo uses CAPTCHA verification to protect against spam or other unauthorized account access. By selecting the correct images, you verify you're human and ...

How to use captcha, understand, use and implement captcha, to ...


What is Captcha ? Captcha is an acronym - explained later, but mainly captcha is a simple verification system made up of: 1] the captcha image and the captcha ...

What exactly is a CAPTCHA? How does it work? | Dictionary.com Blog


Oct 11, 2011 ... Websites use CAPTCHAs to keep spammers from posting on their sites. ... verification anymore and all is happy without the sad captcha tripe.

Form doesn't accept the captcha code| 123ContactForm Help


In some browsers, the captcha code (verification number) is not accepted, even though it's typed in correctly. Follow our guide to fix this problem.

Invisible reCAPTCHA - Google


A captcha system that uses successful decodings to helps digitise books for online use. Background, and details on how to incorporate into a site. Source code ...

Captcha script for web forms - SnapHost.com


Captcha script. Free and paid HTML code for Captcha form-to-email scripts. Web forms with anti-spam protection, ready to be copied-and-pasted to your site.