[dm-crypt] Variable data offset for a LUKS volume that uses a detached header.

Arno Wagner arno at wagner.name
Wed Dec 23 05:26:35 CET 2015

On Tue, Dec 22, 2015 at 16:39:48 CET, .. ink .. wrote:
> >> Reason for doing this is an attempt at having a detached LUKS header
> >> capable of unlocking a VeraCrypt volume since
> >> unlocking a VeraCrypt volume takes too long and its annoying.
> >
> > Oh, yes. I did complain to them, never got an answer. I plan
> > to move my Windows machine back to the last Truecrypt, since
> > the one known vulnerability seems not to affect single-user
> > machines anyways.
> >
> Recent versions of VeraCrypt has an option to default to TrueCrypt
> volumes when unlocking
> and hence you can use it the same way you use TrueCrypt and because of this,i
> think its better to continue to use VeraCrypt with the option set to
> use it as if its TrueCrypt.
> You can set the option at: menu->settings->preferences->mount
> options->TrueCrypt mode.

I agree. Thanks for the info, will try that.

> > Currently I am attaching 8 zeros to the pasphrase, so I can unlock
> > my high-entropy passhrase with iteration 10 and not wait 70 seconds
> > in VeraCrypt. Somebody there really has no clue why usability is
> > important and that users should be able to ovverride most things.
> > They may just know more than the developers about their application
> > scenario...
> >
> zuluCrypt can create VeraCrypt volumes with a PIM value of 1 and a
> blank password as minimum
> requirements.

Also good to know. I think I will make it easier on me and just
decrypt, then recrypt with TrueCrypt and use VeraCrypt on that
volume. Takes longer but is 5 minutes of actuial work. 

> > Does anybody know what the status of CipherShed and TCnext is and
> > whether they have more of a clue?
> >
> I peek at their mailing lists at a rate of about once a month and i do
> not think they are going
> anywhere anytime soon[1].

That was my impression as well. Maybe in a year or two they
will have something.


Arno Wagner,     Dr. sc. techn., Dipl. Inform.,    Email: arno at wagner.name
GnuPG: ID: CB5D9718  FP: 12D6 C03B 1B30 33BB 13CF  B774 E35C 5FA1 CB5D 9718
A good decision is based on knowledge and not on numbers. -- Plato

If it's in the news, don't worry about it.  The very definition of 
"news" is "something that hardly ever happens." -- Bruce Schneier

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