Tip: Converting between different ciphers

[Pasi Kärkkäinen <pasik@iki.fi>]

Hello!

If you need to convert your crypto-fs from cipher to another (for example
from serpent to aes), you can use this:

1) setup loop0 (your current crypto-fs)
2) setup loop1 using the same device as loop0, but using the new cipher
3) don't mount loop0 or loop1
4) dd if=/dev/loop0 of=/dev/loop1
5) detach the loops
6) setup loop0 using the new cipher
7) done

Worked at least in couple of machines. 
Use at your own risk! Remember the backups!

-- Pasi Kärkkäinen
       
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