Do you need to protect uploaded files so they can only be viewed by logged-in users? If so, then check out our new plugin for WordPress, MCM Protected File View.
This plugin does not work with the media library. It only protects files uploaded through the plugin itself.
Requires a web server that supports .htaccess files for access control, such as Apache on Linux.
If you're interested in helping develop this plugin, you're welcome to collaborate with us on GitHub.