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Message
From: Rudolf Usselmann <rudi@a...>
Date: 27 Aug 2003 12:16:09 +0700
Subject: Re: [oc] Encryption algorithms map to hardware
On Wed, 2003-08-27 at 01:32, Erez Birenzwig wrote:
> I was just wondering if anyone that read the first reference (AES in HW)
> actually understood how to implement it ?
> >From what I could find around almost everyone is implementing the
> S-BOX as look-up tables.
> Did you see any better implementation ?
Hmm, unless you can find a mathematical relationship between
the input and output, which will be more efficient than a look
up table (ROM), there is no advantage in implementing it any
other way.
Since this function has to be small and fast, it seems that
the ROM implementation is the cleanest way in doing the S-BOX.
>
> Erez.
Best Regards,
rudi
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