[dm-crypt] dm-crypt vs Luks: What’s the difference on disk

Arno Wagner arno at wagner.name
Wed Aug 13 02:25:21 CEST 2014


It should. You can try on a loop-file to be sure.

Arno

On Tue, Aug 12, 2014 at 21:03:17 CEST, Michael wrote:
> So a Luks partition with a detached header would look the same as a
> plain dm-crypt partition, right?
> Quoting Arno Wagner <arno at wagner.name>:
> 
> >Simple: plain dm-crypt is header-less.
> >More info in the FAQ, Section 6, in particular Items
> >6.11 and 6.12.
> >
> >Arno
> >
> >
> >On Tue, Aug 12, 2014 at 15:11:18 CEST, Michael wrote:
> >>
> >>Hi,
> >>
> >>I was wondering why a plain dm-crypt partition looks like random
> >>data while with a Luks partition an attacker will know that the
> >>partition is encrypted. What is exactly the difference on disk? Is
> >>it the header that would tell someone thats an encrypted partition?
> >>Would a Luks partition with a detached header change this situation?
> >>
> >>Thanks.
> >>--
> >>Regards,
> >>Michael
> >
> >>pub  2048R/CF8EDAA3 2014-06-04 Michael G <michael at skrilnetz.net>
> >>sub  2048R/28ADE1E3 2014-06-04
> >
> >>_______________________________________________
> >>dm-crypt mailing list
> >>dm-crypt at saout.de
> >>http://www.saout.de/mailman/listinfo/dm-crypt
> >
> >
> >--
> >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
> >_______________________________________________
> >dm-crypt mailing list
> >dm-crypt at saout.de
> >http://www.saout.de/mailman/listinfo/dm-crypt
> 
> 
> -- 
> Regards,
> Michael

> pub  2048R/CF8EDAA3 2014-06-04 Michael G <michael at skrilnetz.net>
> sub  2048R/28ADE1E3 2014-06-04

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-- 
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


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