Where is the data encrypted? Local or remote? If its done remotely, whoever owns the hardware and has root on the host OS has your private key. Even with rented servers, where you are root, the KVM is king.
It is encrypted remotely using LUKS, but I have to enter password manually when machine is booting (via web VNC). Of course I understand that determined attacker from hoster side could sniff that password, but, as I said, that's more about preventing automatic scripts to mount my disks rather than trying to hide something.
