The Completely Automated Public Turing test to tell Computers and Humans Apart is one of the internet's most annoying features. You know it as CAPTCHA, the feature that forces you to identify yourself ...

Forbes contributors publish independent expert analyses and insights. Davey Winder is a veteran cybersecurity writer, hacker and analyst.

Almost everyone who uses the internet will have encountered CAPTCHA challenges, where websites and app sign-in screens require you to pass a little test like having to tap on images of traffic lights ...

CAPTCHAs are, ironically, one of the most irritating pieces of technology ever invented to help humans. These tests try to stump software agents that won’t be able either to identify items shown ...