CAPTCHAs were designed for identifying computers and humans apart. Initially, they were simple tests, which required users to identify certain words. However, c

CAPTCHAs were designed for identifying computers and humans apart. Initially, they were simple tests, which required users to identify certain words. However, computer vision is growing leaps and bounds. So these test have become so complicated that even humans find it difficult to comprehend CAPTCHAs. CAPTCHAs have gone from simple tests to extremely complicated ones over last 10 years but design has never changed. We need overhaul of CAPTCHA design. They need to be both usable and secure. P.S. I'm working on the project to make CAPTCHAs more usable. We will have some updates soon. :)