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Date: Sat, 8 Dec 2007 21:42:39 +0100 From: Willy Tarreau <w@....eu> To: Jeff Garzik <jeff@...zik.org> Cc: Matt Mackall <mpm@...enic.com>, Theodore Tso <tytso@....edu>, Mike McGrath <mmcgrath@...hat.com>, Jon Masters <jonathan@...masters.org>, Alan Cox <alan@...rguk.ukuu.org.uk>, Ray Lee <ray@...rabbit.org>, Adrian Bunk <bunk@...nel.org>, Marc Haber <mh+linux-kernel@...schlus.de>, linux-kernel@...r.kernel.org, hmh@...ian.org Subject: Re: entropy gathering (was Re: Why does reading from /dev/urandom deplete entropy so much?) On Sat, Dec 08, 2007 at 02:36:33PM -0500, Jeff Garzik wrote: > > As an aside... > > Speaking as the maintainer rng-tools, which is the home of the hardware > RNG entropy gathering daemon... > > I wish somebody (not me) would take rngd and several other projects, and > combine them into a single actively maintained "entropy gathering" package. > > IMO entropy gathering has been a long-standing need for headless network > servers (and now virtual machines). > > In addition to rngd for hardware RNGs, I've been daemons out there that > gather from audio and video sources (generally open wires/channels with > nothing plugged in), thermal sources, etc. There is a lot of entropy > that could be gathered via userland, if you think creatively. I remember having installed openssh on an AIX machines years ago, and being amazed by the number of sources it collected entropy from. Simple commands such as "ifconfig -a", "netstat -i" and "du -a", "ps -ef", "w" provided a lot of entropy. Regards, Willy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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