Captcha

Google introduces invisible reCaptcha to go easy on humans and hard on bots

The invisible Recaptcha option validates humans in the background, without interrupting the browsing experience.

Computer Cracks CAPTCHAs In Step Toward AI

CAPTCHAs are the squiggly letters, which are often blurred, smeared and cluttered with dots and lines to test whether the user is human or machine.

Scientists Writing Foolproof Computer Security Code

The new technique will generate an infinite number of moving 'emergence' images that will be virtually impossible for any computer algorithm to decode.

New Google technology can solve CAPTCHA puzzles

Researchers pose as scammers to curb spam on Twitter

Any regular user of Twitter will testify against how annoying spam and spammy accounts on the micro-blogging website can get. However, there are a bunch of

Meet CRAPCHA, a CAPTCHA that you can never solve

You can never comprehend a CRAPCHA, and if its makers are to be believed, that is exactly what it is supposed to do.

Facebook's Upping its Security Features With Social Captcha and HTTPS

Their new system includes being able to use Facebook entirely on https and social captcha.