[dm-crypt] please HELP - can't acces encrypted LVM after linux reinstallation.

Aleksander Swirski aleksanderswirski at gmail.com
Fri Oct 28 18:38:41 CEST 2011


thank you. i made big mistake. at least I have plenty of space now ...

On 29 October 2011 05:24, Arno Wagner <arno at wagner.name> wrote:

> As LUKS is specifically designed with anti-forensic features,
> a "trace" would not help at all. In fact changing a few bits
> in the keyslots in random locations is quite enough to
> make the data inacessible permanently. As others have said,
> without header backup there is no way.
>
> Side note: Encryption does not remove the need for backup.
> In fact, the FAQ discusses several encrypted backup options.
>
> Arno
>
>
> On Sat, Oct 29, 2011 at 05:05:59AM +1300, Aleksander Swirski wrote:
> > thank you for your replies. if someone knows, if it's possible to find
> some
> > trace of old header under the new one ... please let me know. if it's
> > definitely not possible ... please let me know. the crypt partition
> wasn't
> > moved or resized, also the home logical volume, which I lost was
> > 'continuous' and wasn't moved or resized.
> >
> > On 29 October 2011 05:03, Arno Wagner <arno at wagner.name> wrote:
> >
> > > On Fri, Oct 28, 2011 at 05:53:48PM +0200, Marc Ballarin wrote:
> > > > Am Samstag, den 29.10.2011, 04:23 +1300 schrieb Aleksander Swirski:
> > > > ...
> > > > > I now realize what might have happened. As I explained I set up
> same
> > > > > passphrase again on this crypt disk when installing new system. But
> I
> > > > > suspect, encryption key underneath could be changed and LVM is now
> > > > > scrambled?
> > > >
> > > > Yes, if you used LUKS this is exactly what happened. cryptsetup
> created
> > > > a new, random master key and wrote it over your old master key.
> > >
> > > I wonder whether I should as a warning about this at the beginning
> > > of the FAQ.
> > >
> > > Arno
> > > --
> > > Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email:
> > > arno at wagner.name
> > > GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25
> > > 338F
> > > ----
> > > Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
> > >
> > > 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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> > >
>
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>
> --
> Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email:
> arno at wagner.name
> GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25
> 338F
> ----
> Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
>
> 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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> http://www.saout.de/mailman/listinfo/dm-crypt
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