Bots account for nearly half of global internet traffic, increasing the need for online security. Whether browsing on an Android phone or a Chromebook, you've likely encountered the "I'm not a robot" ...

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 ...

Artificial intelligence inspired by the human brain has achieved a "hallmark of human intelligence" by cracking CAPTCHA tests designed to protect websites from bots, paving a path towards general ...

A new game by Neal Agarwal wants you to prove you’re human by solving 48 increasingly difficult CAPTCHA puzzles.

Modern captchas are effective at keeping bots and algorithms from accessing Web sites made for humans. They also generate collateral damage and keep up to 25 percent of humans out, too, according to ...

A new study suggested that text-based CAPTCHAs, one of the most widely used website security mechanisms, are no longer safe when facing smarter artificial intelligence. Text-based CAPTCHA uses a ...

While puzzling captchas—from dogs in hats to sliding jockstraps—still exist, most bot-deterring challenges have vanished into ...