Fixing the CAPTCHA: turning jumbled words into a game

CAPTCHAs, or those jumbled words you have to enter to prove you’re a human on websites, suck. They detract from a website’s flow, and as security researchers at Imperva have found, they’re actually easily overcome by spammers. But some CAPTCHA creators are coming up with ways to make it harder for spammers, and more fun for the regular humans out there.