Hosting WooCommerde Digital Downloads on separate server

Hey! I’m currently developing a digital marketplace and I was wondering, could you host WooCommerce digital downloads on a separate server?

I mean, its an obvious yes, but I want to know if I could do that but also be able to keep the files secure so they cant just be downloaded by going to the url.

I’m currently running WordPress on Ubuntu 14.04 on an Apache server. Yes I have root access. My database is also remotely accessible