Cryptsetup in Voxel (RBR50)

[mgiunktode]

I'd like to use cryptsetup in voxel firmware... but I get this error:

root@RBR50:/tmp/mnt/sda1# cryptsetup luksOpen cryptodisk.dat encVolume
Enter passphrase for cryptodisk.dat:
Attaching loopback device failed (loop device with autoclear flag is required).

It might be related to the absence of moduel loop:

root@RBR50:/tmp/mnt/sda1# modprobe loop
modprobe: module 'loop' not found

Is it possible to solve this problem? Is there another solution for having an encrypted filesystem on the router?

Thanks,