Am Sat, 2 Apr 2016 11:44:32 +0200
schrieb Marc Haber <mh+linux-bt...@zugschlus.de>:

> On Sat, Apr 02, 2016 at 11:03:53AM +0200, Kai Krakow wrote:
> > Am Fri, 1 Apr 2016 07:57:25 +0200
> > schrieb Marc Haber <mh+linux-bt...@zugschlus.de>:  
> > > On Thu, Mar 31, 2016 at 11:16:30PM +0200, Kai Krakow wrote:  
>  [...]  
>  [...]  
>  [...]  
> > > 
> > > I cryptsetup luksFormat'ted the partition before I mkfs.btrfs'ed
> > > it. That should do a much better job than wipefsing it, shouldnt
> > > it?  
> > 
> > Not sure how luksFormat works. If it encrypts what is already on the
> > device, it would also encrypt orphan superblocks.  
> 
> It overwrites the LUKS metadata including the symmetric key that was
> used to encrypt the existing data. Short of Shor's Algorithm and
> Quantum Computers, after that operation it is no longer possible to
> even guess what was on the disk before.

If it was encrypted before... ;-)

-- 
Regards,
Kai

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