[dm-crypt] two factor authentication with zuluCrypt

Arno Wagner arno at wagner.name
Mon Oct 17 06:36:35 CEST 2011

This will work, but it is not really 2-factor, as the key-file will 
not be "something you have". In fact, "something stored on disk" is
already done by LUKS, in the form of the salts and the key.

If you store part of the passphrase on an USB-Key, that may be
borderline 2-factor, but I doubt it really increases security.


On Sun, Oct 16, 2011 at 11:44:03PM -0400, .. ink .. wrote:
> I want to add the ability to create create and access volumes using two
> factors, a passphrase and a key file. What is the best way to achieve this?
> The simplest way to do it i can think of is to read the file and then append
> the passphrase at the beginning, in the middle or at the end of it.
> Will this be adequate? what is the best way to do this or is it a bad idea?

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Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno at wagner.name 
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