CAPTCHA is a crucial security tool to verify human users and protect websites from bots, but faces challenges.

Hack attacks via CAPTCHAs are dangerous because users click on them out of habit when they appear on websites. Hackers are now exploiting this instant-reaction behavior with fake pop-up messages that ...

You see a CAPTCHA alert that instructs you to click ... But instead of asking you to spell out some nonsense text or click ...