A company that makes a security product designed to thwart problems such as comment spam has added new features for website owners. NuCaptcha’s product takes a different approach to the CAPTCHA, which stands for “Completely Automated Public Turing Test to Tell Computers and Humans Apart” The more difficult CAPTCHAS are also hard for humans and impede a user’s experience on a website. The company has also improved the behavior analysis system, which studies how a bot is using a website and can adjust itself to defend against attacks.”]
Source: https://www.csoonline.com/article/2129324/nucaptcha-improves-integration-of-captcha-system.html