In continuation to previous article on Securing Spring Boot Application by Simple CAPTCHA, here in this article we will discuss about Google reCAPTCHA. Needless to say, reCAPTCHA protects your application or website from fraud and misuse. It uses an advanced risk analysis engine and flexible challenges to keep malicious software out from entering into offensive activities on your website. Meanwhile, allowed users will be able to login, view pages, or create accounts. On the other hand, fraud users will be blocked. We have already discussed the fundamentals of captcha including it's definition & types in our previous article. In short, reCAPCHA is a type of captcha security. We will talk all about it in our article 'How To Secure Spring Boot