linux-kernel - Re: Why does reading from /dev/urandom deplete entropy so much?

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Date:	Sun, 9 Dec 2007 13:42:00 +0100
From:	Marc Haber <mh+linux-kernel@...schlus.de>
To:	Matt Mackall <mpm@...enic.com>
Cc:	Eric Dumazet <dada1@...mosbay.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Adrian Bunk <bunk@...nel.org>, linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: Why does reading from /dev/urandom deplete entropy so much?

On Wed, Dec 05, 2007 at 03:26:47PM -0600, Matt Mackall wrote:
> The distinction between /dev/random and /dev/urandom boils down to one
> word: paranoia. If you are not paranoid enough to mistrust your
> network, then /dev/random IS NOT FOR YOU. Use /dev/urandom.

But currently, people who use /dev/urandom to obtain low-quality
entropy do a DoS for the paranoid people.

Greetings
Marc

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