[dm-crypt] The future of disk encryption with LUKS2

Arno Wagner arno at wagner.name
Fri Feb 5 12:02:32 CET 2016


On Fri, Feb 05, 2016 at 07:30:50 CET, Yves-Alexis Perez wrote:
> On jeu., 2016-02-04 at 18:17 +0100, Arno Wagner wrote:
> > Maybe my crypto-knowledge deserts me here, but how is that
> > relevant for storage encryption? 
> > 
> > If somebody can replay old storage blocks, they have already 
> > compromised your machine and can do what they want, 
> 
> Think external drives / removable storage?

An attacker with physical access that you do not notice has 
won. Storage encryption does not protect here. Think, for 
example, "evil maid" type attacks. Storage encryption
is only for theft of the device (which you notice) or 
attacker access which you notice in other ways.

Regards,
Arno


> > 
> > And authenticated encryption seems to not even apply to storage,
> > unless you are thinking about integrity. 
> 
> Indeed.
> 
> > If so, wrong project,
> > as integrity always requires additional bits and LUKS/DM-cryopt
> > does not have them bu design.
> 
> I am well aware of the need to store the integrity patterns, that's why I'm
> asking this in context of LUKS2. Thanks for the reply though.
> 
> Regards,
> -- 
> Yves-Alexis
> 



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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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