Copyright Protected is a WordPress plugin that automatically displays a copyright statement that contains the current copyright year.

Copyright Protected

Displays a copyright statement with the current year. Requires PHP.

Sebastian Weiß

Lightweb Media Basic Authentication is a plugin for protected your development WordPress site like .htpasswd. 
The Plugin supported an localhost bypass for the wp-cli and an mu-plugin creation for Rollbacks.
Features:
<ul>
<li>Easy for setting Basic Authentication</li>
<li>Basic Authentication works like .htpasswd</li>
<li>Protected development website or demo website without .htpasswd</li>
<li>Support Docker and Kubernetes (K8s)</li>
<li>The plugin is lightweight.</li>
<li>Create mu-plugin for rollbacks</li>
<li>Allow Bypassing for localhost (for WP-CLI)</li>
</ul>

Lightweb Media Basic Authentication

Lightweb Media Basic Authentication for protected your development WordPress site like .htpasswd

Copyright Protected vs Lightweb Media Basic Authentication