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So I have a need for a encrypted disk - as a loop back file. I wrote earlier on how to restore a partimage backup to loopback, so lets see if we can make this work.

  1. We need to tell the kernal how to encrypt disks with a module
    • modprobe cryptoloop
  2. Create the loop file (like before, but with urandom to help hide the disk, the count is MB*1000 so in this case 1M)
    • dd if=/dev/urandom of=myharddisk.img bs=1000 count=1000 
  3. Create the loopback device (I'm going to use TwoFish)
    • losetup -e twofish /dev/loop0 ./myharddisk.img
  4. At this point, you will be asked for a password - create your own
  5. Create the file system of choice (ext3 for me)
    • mkfs.ext3 /dev/loop0  
  6. Mount the new loop back point /dev/loop0
    • mount /dev/loop0 /mnt/my/mount/point

Enjoy!

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