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Date:      Wed, 07 Jun 2000 08:07:46 +0200
From:      Mark Murray <mark@grimreaper.grondar.za>
To:        "Jeroen C. van Gelderen" <jeroen@vangelderen.org>
Cc:        Dan Moschuk <dan@FreeBSD.org>, Mark Murray <mark@grondar.za>, arch@FreeBSD.org, phk@FreeBSD.org
Subject:   Re: (2nd iteration) New /dev/(random|null|zero) - review, please 
Message-ID:  <200006070607.IAA24428@gratis.grondar.za>
In-Reply-To: <393D5D46.6BCACDE4@vangelderen.org> ; from "Jeroen C. van Gelderen" <jeroen@vangelderen.org>  "Tue, 06 Jun 2000 16:21:26 -0400."
References:  <393D5D46.6BCACDE4@vangelderen.org> 

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> > Because of the significant speed decrease in using Yarrow, I'd like to see
> > us keep the current implementation around, and having Yarrow as an
> > option or psuedo-device to be used instead.
> 
> Yarrow -when finished- is not noticably slower than our current
> implementation of /dev/[u]random. Yarrow does one block encryption
> for every output block and a generator gate every 10 blocks. This
> would allow for at least 40 mbit/s output on a 200 Mhz PPro when 
> using Rijndael/256/256.

I tend to agree; I am currently using SHA1 and DES3, and it is quite
slow, mostly in the proportion of DES3::MD5 speeds, which makes sense
as the existing implementation uses MD5.

M
--
Mark Murray
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