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From: Willy Tarreau <w@1wt.eu>
To: Jeff Garzik <jeff@garzik.org>
Cc: Matt Mackall <mpm@selenic.com>, Theodore Tso <tytso@mit.edu>,
	Mike McGrath <mmcgrath@redhat.com>,
	Jon Masters <jonathan@jonmasters.org>,
	Alan Cox <alan@lxorguk.ukuu.org.uk>, Ray Lee <ray@madrabbit.org>,
	Adrian Bunk <bunk@kernel.org>,
	Marc Haber <mh+linux-kernel@zugschlus.de>,
	linux-kernel@vger.kernel.org, hmh@debian.org
Subject: Re: entropy gathering (was Re: Why does reading from /dev/urandom deplete entropy so much?)
Date: Sat, 8 Dec 2007 21:42:39 +0100	[thread overview]
Message-ID: <20071208204239.GG15227@1wt.eu> (raw)
In-Reply-To: <475AF241.5000809@garzik.org>

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


  parent reply	other threads:[~2007-12-08 20:44 UTC|newest]

Thread overview: 77+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-12-04 11:41 Why does reading from /dev/urandom deplete entropy so much? Marc Haber
2007-12-04 14:16 ` Eric Dumazet
2007-12-04 16:18 ` Adrian Bunk
2007-12-04 16:47   ` Alan Cox
2007-12-04 18:17     ` Eric Dumazet
2007-12-05 21:26       ` Matt Mackall
2007-12-06  7:02         ` Eric Dumazet
2007-12-06 16:09           ` Matt Mackall
2007-12-09 12:42         ` Marc Haber
2007-12-09 16:16           ` Matt Mackall
2007-12-10 23:06             ` Marc Haber
2007-12-10 23:35               ` Matt Mackall
2007-12-11  1:34                 ` Theodore Tso
2007-12-11 19:46                   ` Phillip Susi
2007-12-11 20:02                     ` Ray Lee
2007-12-12  5:34                     ` David Schwartz
2007-12-04 16:54   ` Ray Lee
2007-12-04 16:55     ` Alan Cox
2007-12-04 18:02       ` Matt Mackall
2007-12-04 19:50         ` Theodore Tso
2007-12-04 20:36           ` Matt Mackall
2007-12-04 20:40           ` Alan Cox
2007-12-04 20:48             ` Mike McGrath
2007-12-04 21:54               ` Matt Mackall
2007-12-04 22:03               ` Theodore Tso
2007-12-04 22:12                 ` Mike McGrath
2007-12-04 22:28                   ` Matt Mackall
2007-12-04 21:08             ` Matt Mackall
2007-12-04 21:18               ` Mike McGrath
2007-12-04 22:15                 ` Matt Mackall
2007-12-04 22:23                   ` Mike McGrath
2007-12-04 22:33                     ` Matt Mackall
2007-12-05 14:26                       ` Mike McGrath
2007-12-05 14:49                         ` Theodore Tso
2007-12-08  7:38                           ` Jon Masters
2007-12-08 17:32                             ` Theodore Tso
2007-12-08 17:33                               ` Mike McGrath
2007-12-08 17:49                                 ` Theodore Tso
2007-12-08 17:54                                   ` Jon Masters
2007-12-08 18:15                                   ` Matt Mackall
2007-12-08 18:24                                     ` Theodore Tso
2007-12-08 19:36                                     ` entropy gathering (was Re: Why does reading from /dev/urandom deplete entropy so much?) Jeff Garzik
2007-12-08 19:53                                       ` Matt Mackall
2007-12-08 20:04                                         ` Jeff Garzik
2007-12-08 20:19                                           ` Matt Mackall
2007-12-08 21:07                                             ` Willy Tarreau
2007-12-08 20:31                                           ` Theodore Tso
2007-12-08 20:47                                             ` Jeff Garzik
2007-12-08 20:42                                       ` Willy Tarreau [this message]
2007-12-08 23:47                                         ` Theodore Tso
2007-12-09  1:07                                           ` Jon Masters
2007-12-08 18:31                                   ` Why does reading from /dev/urandom deplete entropy so much? Jeff Garzik
2007-12-08 20:26                                     ` David Schwartz
2007-12-08 17:43                               ` Matt Mackall
2007-12-08 17:47                                 ` Jon Masters
2007-12-08 18:05                                 ` Theodore Tso
2007-12-08 17:45                               ` Jon Masters
2007-12-10 16:37                           ` Pavel Machek
2007-12-04 18:01     ` Matt Mackall
2007-12-06 20:08       ` Bill Davidsen
2007-12-05 12:23     ` Marc Haber
2007-12-05 12:29   ` Marc Haber
2007-12-05 13:33     ` Theodore Tso
2007-12-05 15:10       ` Marc Haber
2007-12-06 19:32   ` Bill Davidsen
2007-12-08 22:03     ` Adrian Bunk
2007-12-08 22:10       ` Ismail Dönmez
2007-12-08 23:46         ` Theodore Tso
2007-12-09  5:21           ` Willy Tarreau
2007-12-09  6:52             ` Jon Masters
2007-12-09  6:21           ` Ismail Dönmez
2007-12-09 12:31             ` Theodore Tso
2007-12-09 14:06               ` Ismail Dönmez
2007-12-11 15:42       ` Bill Davidsen
2007-12-20 22:27         ` Marc Haber
2007-12-26 18:27           ` Phillip Susi
2007-12-04 18:49 ` Russ Dill

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