[dm-crypt] Possibility for safe Luks partition delete functionality

Arno Wagner arno at wagner.name
Wed Dec 11 21:21:51 CET 2013

On Wed, Dec 11, 2013 at 20:18:16 CET, Heinz Diehl wrote:
> On 11.12.2013, Heinz Diehl wrote: 
> > You can do that easily by running dd against the first MB's of the
> > respective partition..
> I forgot: you can just switch off the power, which will surely be
> much faster than wiping the LUKS header.

Ah, no? Unless you have it in a RAM-disk? If you power off,
the device is not mapped anymore, but the header is there.
Wit things like rubber-hise cryptoanalysis, you can still get
at it. If the header is wiped, that becomes impossible.

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
There are two ways of constructing a software design: One way is to make it
so simple that there are obviously no deficiencies, and the other way is to
make it so complicated that there are no obvious deficiencies. The first
method is far more difficult.  --Tony Hoare

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