Add CAPTCHA in WordPress Login and Registration Form?
To add captcha in WordPress login and registration form is a response test which confirms whether the user is human or not. Also, registration forms to be submitted incorporates a Captcha assuring that the user is human. This ensures the security and protection of an entry made by the user. On the other hand, the use of CAPTCHA prevents spamming as well.
The reCAPTCHA plugin will not prevent the attempt of brute force attacks, rather it will simply ensure that they do not succeed. That is, scripts may still attempt direct POST attacks against /wp-login.php, but without the correct reCAPTCHA data, they will not go through (even if they have guessed the login and password correctly). To prevent repeat attempts against /wp-login.php, consider using a plugin that limits login attempts in conjunction with this one. Other approaches, such as a web application firewall should also form a part of your complete defense-in-depth strategy.
How to Setup CAPTCHA for WordPress Login and Registration
The comments section is always an interesting place to find different views on topics, but it is also an easy spot for spam bots advertising other websites or products. If half the comments are about the content and the rest are all advertising other websites it can really hurt the discussion on a blog. This can be avoided by having a WordPress CAPTCHA registration on the comments section. This will ensure that bots cannot leave a comment without passing a CAPTCHA test.