CAPTCHA: The story behind those squiggly computer letters

  • Article by: STACEY BURLING , Philadelphia Inquirer
  • Updated: July 24, 2012 - 5:45 PM

Those little puzzles that help distinguish humans from 'bots' indeed are getting harder.

ADVERTISEMENT

Connect with twitterConnect with facebookConnect with Google+Connect with PinterestConnect with PinterestConnect with RssfeedConnect with email newsletters

ADVERTISEMENT

Advertisement
Golden Gavel by Star Tribune

Countdown to great deals

Bid Sept. 21-29

ADVERTISEMENT

ADVERTISEMENT

ADVERTISEMENT

ADVERTISEMENT

ADVERTISEMENT