Thanks ^^
I tried dm-crypt since I cant really use the Fuse one 
But ok, Installed all.
Now I need to use it.
I did mount proc in my OpenVZ system (since it needs proc) and now I need to use /dev of the original system aswell.
is it save to mount that? And how to mount that?
Since I first have to use dm-setup to create a device so I did that and I got this:
1 / # dmsetup create sxb
/dev/mapper/control: open failed: Permission denied
Failure to communicate with kernel device-mapper driver.
Command failed
Im not sure I understand it but if I do I need:
- dmsetup create <name>
- 0 <sector count> crypt <sector format> <key> <IV offset> <real device> <sector offset>
- cryptsetup [<OPTIONS>] create <name> [<device>]
- cryptsetup [<OPTIONS>] status <name> [<device>]
I hope I am right here?
I need to mount it only when the user wants to. So not when the system boots.
Cheers,
Robin