From: Grant Edwards <grante@visi.com>
To: ecos-discuss@sources.redhat.com
Subject: [ECOS] Re: Entropy gathering?
Date: Thu, 03 Apr 2008 19:29:00 -0000 [thread overview]
Message-ID: <ft3ahk$mbj$1@ger.gmane.org> (raw)
In-Reply-To: <ft39cc$hfe$1@ger.gmane.org>
On 2008-04-03, Grant Edwards <grante@visi.com> wrote:
> The BSD stacks appear to use an aRC4 keystream for "random"
> data. The stream uses a constant seed and then mixes in the
> system clock value. It could be worse, but it's not great
> either.
Upon reading the above statement, I think I should clarify that
the "system time" that's mixed in is the HAL's hardware counter
value and not the system tick count time. The hardware counter
is changing much faster (a good thing), but it provides
relatively few bits (on my targets, it ranges from 14-18).
--
Grant Edwards grante Yow! My mind is making
at ashtrays in Dayton ...
visi.com
--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
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next prev parent reply other threads:[~2008-04-03 19:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-03 19:18 [ECOS] " Grant Edwards
2008-04-03 19:29 ` Grant Edwards [this message]
2008-04-03 19:53 [ECOS] " Jay Foster
2008-04-03 20:00 ` Grant Edwards
2008-04-03 21:49 Jay Foster
2008-04-03 22:29 ` Grant Edwards
2008-04-04 9:13 ` Markus Schaber
2008-04-04 14:15 ` Grant Edwards
2008-04-07 8:38 ` Daniel Néri
2008-04-07 10:57 ` Markus Schaber
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