From: Yaron Sheffer <yaronf@porticor.com>
To: dm-crypt@saout.de
Subject: [dm-crypt] XTS performance
Date: Mon, 30 Apr 2012 15:00:21 +0300 [thread overview]
Message-ID: <4F9E7ED5.4050103@porticor.com> (raw)
Hi,
Looking back at the archives, it appears that AES-XTS in dm-crypt runs
at half the speed of AES-CBC-ESSIV:
http://www.saout.de/pipermail/dm-crypt/2010-November/001348.html. Milan
explained it at the time by XTS doing 2 AES operations for each
plaintext block. But my understanding of XTS is that it is similar to
ESSIV: 1 AES op per 16-byte block, plus 1 op for the sector.
- Did I misread the definition of XTS, and it's really 2 AES ops per
16-byte block?
- Does anybody have more recent performance comparisons, confirming (or
not) the performance difference?
Thanks,
Yaron
next reply other threads:[~2012-04-30 12:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-30 12:00 Yaron Sheffer [this message]
-- strict thread matches above, loose matches on Subject: below --
2012-05-01 6:26 [dm-crypt] XTS performance Yaron Sheffer
2012-05-01 9:29 ` Arno Wagner
2012-05-01 12:35 ` Heinz Diehl
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