You can find needed option in your cpanel.
Password protect directoriesQUOTE
You can protect directories within your site from browsers by using a password to protect them. This allows you to restrict material to only authorized users or store sensitive material online. This has the same appearance and effect as the password protection on CPanel
HotLink PreventionQUOTE
Hotlinking is when another web site owner links directly to one or more of your images or multimedia files and includes it on their web page.
If you have some questions please let me know.