The goal of CAPTCHA is to pose a question or task which is impossible for the computer to complete while also being easy for humans. Take for example the distorted word CAPTCHA type which shows an ...

Spam bots deserve every nightmare. Jeffrey Augustine’s Dream Captcha updates a familiar faux-cultural symbol with the security layer consumers expect from their nocturnal hallucination protection ...

CAPTCHAs are those now ubiquitous challenges you encounter to prove that you’re a human and not a bot when you go to log in to many websites. As a computer scientist, I see CAPTCHAs as an effective ...