[dm-crypt] Efficacy of xts over 1TB

Mario 'BitKoenig' Holbe Mario.Holbe at TU-Ilmenau.DE
Tue Jul 27 23:02:49 CEST 2010

Christoph Anton Mitterer <christoph.anton.mitterer at physik.uni-muenchen.de> wrote:
> On Mon, 2010-07-26 at 11:04 +0200, Mario 'BitKoenig' Holbe wrote:
>> This is basically why Clemens created
>> http://code.google.com/p/cryptsetup/issues/detail?id=3D13
> Wouldn't that mean however, that setting up the mapping takes much
> longer?

Nope, not necessarily. The reason for the initial setup taking some time
is that we choose a large iteration count for PBKDF2 to make attacks
based on guessing the (possibly weak) passphrase harder. This is not
necessary for the derivation of subsequent master keys.

Why did the tachyon cross the road?
Because it was on the other side.

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