If I have a home server connected to Proton Drive for example, would that be sufficient to back up my data?
If you tick the encryption box during install, you will have to enter the decrypt password at every boot and that means that if the power goes out for long enough (UPS doesn’t keep the server up for hours), I (and my family) will not have access to the self hosted stuff until I’ll be home and this is why I encrypt only the data partition and not the boot one.
You can decrypt via ssh at boot. I used dropbear to accomplish that on my machine
That’s interesting, but that won’t help if I’m away or on vacation on the other side of the world
I may be missing something in your use case. As long as you have the port forwarded you can decrypt from anywhere. Use pub key auth and you’re good to go