Last time you signed for an account for nearly anything online, you were probably faced with the dreaded reCAPTCHA widget: A box featuring two (or sometimes more!) wiggly, obscured, scrambled looking ...

Google has continuously been leading the way for better Completely Automated Public Turing test to tell Computers and Human Apart (CAPTCHA) services in order to deal with spambots and make it easier ...

Captchas are well known for keeping automated spammers out and letting humans in. However, ReCaptcha is a rather clever service using them to help digitize books scanned into the Internet Archive as ...