Re: 1,5 TB partition: use cbc-essiv or xts-plain?

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On Thu, Aug 6, 2009 at 12:24, Heinz Diehl<htd@xxxxxxxxxxxxxxxxx> wrote:
> On 06.08.2009, Henrik Theiling wrote:
>
>> Fascinating.  I thought Serpent was universally the slowest of the
>> three big algorithms (AES/Rijndael, Twofish, Serpent) that was used if
>> you wanted highest security margins.  Your speed test results come
>> quite unexpected for me...
>
> The question is: how has this been measured, and is it faster on both read
> and write operations? E.g. a simple "hdparm -tT /dev/xxx" is not sufficient.
>
I just encrypted the partition , put some random data there [i do not
care about write speed in this particular storage, it is just a NAS
(ARM 266 + 128RAM running debian lenny)], then drop_caches , export
the data using nfs, mount from another machine and copy that file.
Repeated the proccess using aes and using serpent. Serpent is much faster ...
I really don't know which cipher is/shouldbe faster, but serpent gives
me a great speed ...

> How about a bonnie++ run, e.g. something like
> "bonnie++ -u htd:users -d /mnt/test -s 16016m -m liesel -n 16:100000:16:6"
>
>
>
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-- 
[]'s
Salatiel

"O maior prazer do inteligente é bancar o  idiota
   diante de um  idiota que banca o inteligente".
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