We see the popular "captcha" security mechanism often - wavy letters websites ask us to type into a box. It's used by web pages and newsletter sign-up forms to prevent computer robots from hacking ...

You have probably seen Captchas - puzzles that ask you to pick out all the bicycles in an image or to decipher letters that are written in squiggly lines. These riddles are designed to let you buy ...

If those bothersome CAPTCHA prompts online seem to be getting harder, it’s because they are. The pesky puzzles are used to ward off bots that crash sites or jeopardize security but now are becoming ...

If you are using the Internet, to prevent access from malicious programs (bots) trying to log in for unauthorized useCAPTCHAYou should have seen the message "I am not a robot" at the site where ...

Digital proof of personhood offers a path out of the arms race between bots and CAPTCHAs, argues Daniel Brunsdon of human.tech.

When you log on to a site or go to buy something online, you may be asked to prove you're not a robot. Those tests are called ...

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 ...