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CAPTCHA - Wikipedia

en.wikipedia.org/wiki/CAPTCHA

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 s...

The Official CAPTCHA Site

www.captcha.net/

Includes demonstrations, research papers, and news.

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

help.yahoo.com/kb/SLN2662.html

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

reCAPTCHA Help - Google Help

support.google.com/recaptcha/?hl=en

Helping everyone, everywhere, one CAPTCHA at a time; Security Help .... reCAPTCHA checkbox checked after successfully completing a verification challenge.

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

blog.dictionary.com/captcha/

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.

Captcha script for web forms - SnapHost.com

www.snaphost.com/captcha/

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.

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

www.123contactform.com/docs/i-enter-the-correct-verification-number-but-the-form-does-not-accept-it-why/

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.

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

www.captcha.tv/

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 ...

Captcha Code — WordPress Plugins

wordpress.org/plugins/captcha-code-authentication/

Adds Captcha Code anti-spam methods to WordPress forms. Forms include comments form, registration form, lost passwordform and login form. In order to post ...

Ticketmaster dumps 'hated' Captcha verification system - BBC News

www.bbc.com/news/technology-21260007

Jan 30, 2013 ... The world's largest online ticket retailer is to stop requiring users to enter hard-to- read words in order to prove they are human. Captcha - which ...

More Info

Captcha Verification - Qualtrics Support

www.qualtrics.com

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

reCAPTCHA: Easy on Humans, Hard on Bots - Google

www.google.com

The new reCAPTCHA is here. A significant number of your users can now attest they are human without having to solve a CAPTCHA. Instead with just a single ...

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

www.aece.ro

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 ...