A typical CAPTCHA security check asks users to read distorted text made difficult for spammers to solve.
A typical CAPTCHA security check asks users to read distorted text made difficult for spammers to solve.
A typical CAPTCHA security check asks users to read distorted text made difficult for spammers to solve.

Business

June 18, 2012 12:00 AM

As Web sites' 'CAPTCHAs' get harder, visitors leave discouraged

  Comments  

Videos