Every time you tick a box that says “I’m not a robot” or select all the pictures with traffic lights, you’re taking a tiny test called CAPTCHA — short for Completely Automated Public Turing test to ...

Everyone knows the CAPCHA tests on websites where you either have to click on numerous pictures of cars, traffic lights, or bicycles, enter confusing combinations of numbers and letters or simply ...

We've all been there: You click on a website and are immediately directed to respond to a series of puzzles requiring you to identify images of buses, bicycles and traffic lights before you can go any ...