A CAPTCHA (an acronym for "Completely Automated Public Turing test to tell
Computers .... equation and requiring the user to enter the solution as verification.
Learn what CAPTCHA is, and why Yahoo uses it to verify you're human.
Includes demonstrations, research papers, and news.
Introduction. Captcha verification is a common web technique to ensure that your
visitors are real humans, and not a program written to spam your survey.
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.
Accessibility; This CAPTCHA is too hard; My computer is sending automated ....
reCAPTCHA checkbox checked after successfully completing a verification ...
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 ...
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 ...
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.
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.