saccilottoconsulting/craft-internal-assets (packagist): A simple plugin to restrict access to assets for permitted users only. Access to a given asset is only granted if the user has view-permissions for the given source (this can be set in the user- or group-settings). The asset source folder should be moved out of the web root folder so the files are never accessible without this plugin.
Keywords: assets|cms|Craft|craftcms|craft-plugin|access restriction