mores

For some reason or other, you might want to allow access to certain posts only to certain people. You can use password-protection on Pages and Posts, but those need to be set individually. 
It’s far simpler to just write a Post, specify a category and all posts in that category are password protected. Or you might decide to protect a lot of old posts. 
Imagine a family blog where certain posts are only visible to people who know the birthday of your first child, or remember your pet’s name. 
Cat-Pass is not for super-sensitive information, it’s for casual use.

Cat-Pass

Cat-Pass lets you password-protect categories. Caution: deactivating the plugin will render your protected posts visible again.

Malik Naik

The reCAPTCHA Lite protects your WordPress site from the bots, brute-force attacks, spam, and abuse. This plugin comes with the support of reCAPTCHA v3 and v2 Checkbox. The reCAPTCHA v3 allows users to navigate site without solving “I’m not a robot” challenges.
You can integrate the Google’s reCAPTCHA in the following forms:
<ul>
<li>Login Form</li>
<li>Registration Form</li>
<li>Lost Password Form</li>
<li>Reset Password Form</li>
<li>Comment Form</li>
<li>WooCommerce Forms</li>
<li>Buddy Press Signup Form</li>
</ul>
If you are using the Google reCAPTCHA v3 then the following actions list shows the action names that will be used to hit the <a href="https://developers.google.com/recaptcha/docs/verify#api_request" rel="nofollow ugc">Google’s reCAPTCHA API endpoint</a> during validation. For more information on actions checkout out the <a href="https://developers.google.com/recaptcha/docs/v3#actions" rel="nofollow ugc">official documentation</a>.
<ul>
<li>login_form</li>
<li>register_form</li>
<li>lost_password_form</li>
<li>reset_password_form</li>
<li>comment_form</li>
<li>woo_register_form</li>
<li>woo_order_checkout</li>
<li>woo_login_form</li>
<li>buddypress_signup</li>
</ul>

reCAPTCHA Lite

Integrate the Google's reCAPTCHA Google's reCAPTCHA v2 Checkbox or v3 into the forms and protect your site from bots, brute-force attacks, s …

Cat-Pass vs reCAPTCHA Lite