[dm-crypt] Efficacy of xts over 1TB

Arno Wagner arno at wagner.name
Tue Jul 27 00:55:18 CEST 2010


On Mon, Jul 26, 2010 at 11:42:37PM +0200, Christoph Anton Mitterer wrote:
> Well....
> 
> I've just read some sections of the Standard... D4 and D6... it rather
> seems that really the whole size (of the partition) is meant,... and not
> just the block size... although they speak of ranges > 100 TB
> 
> 
> *confused now*
> 
> 
> Cheers,
> Chris.

I suspect that comes from only 2^128 possible cipher blocks and the
birthday paradox which would give you the same cipher block twice
when having around 2^64 blocks (modelled as random).

Arno
-- 
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno at wagner.name 
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