[136040] in cryptography@c2.net mail archive
Re: combining entropy
daemon@ATHENA.MIT.EDU (Ben Laurie)
Fri Oct 24 09:29:17 2008
Date: Fri, 24 Oct 2008 14:14:27 +0100
From: "Ben Laurie" <benl@google.com>
To: IanG <iang@systemics.com>
Cc: Cryptography <cryptography@metzdowd.com>
In-Reply-To: <48E0C673.6040005@systemics.com>
On Mon, Sep 29, 2008 at 1:13 PM, IanG <iang@systemics.com> wrote:
> If I have N pools of entropy (all same size X) and I pool them
> together with XOR, is that as good as it gets?
Surely not. Consider N pools each of size 1 bit. Clearly you can do
better than the 1 bit your suggestion would yield.
More concretely, concatenation would seem better than XOR.
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