I've got a question about the use of encryption:

I set up a Ubuntu 12.04 server to use it as a router, file server for backups and webserver. Of course, it is probably not the best idea to put backups on the same system as a web server, but it is only for private usage and I don't want to spend too much money.

So I thought it is not a bad idea to set up /home-encryption for the backup-user-account with which I do my backups. But in the same moment, another quesiton arises: Does it still makes sense?

Via SSH, root login is disabled. And access to the /home-folder of that user is reduced to the user itself.

So the only scenario to access the /home-folder is to connect keyboard/display to the server, login as root and change to /home. Or have I overseen a scenario? In case I am right, you can only access the /home-folder from "outside" as the backup-user. But than, encryption also doesn't make sense anymore.

Am I right about that thoughts? Or do you still see a way to access the /home-folder of the backup user so that encryption still makes sense?

Thanks for your help in advance!