From owner-freebsd-security@FreeBSD.ORG  Mon Jun 19 11:49:24 2006
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From: des@des.no (Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?=)
To: "R. B. Riddick" <arne_woerner@yahoo.com>
References: <20060619101133.31660.qmail@web30307.mail.mud.yahoo.com>
Date: Mon, 19 Jun 2006 13:49:19 +0200
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	(R. B. Riddick's message of "Mon, 19 Jun 2006 03:11:33 -0700 (PDT)")
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Cc: freebsd-security@freebsd.org, Nick Borisov <neiro21@gmail.com>
Subject: Re: memory pages nulling when releasing
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"R. B. Riddick" <arne_woerner@yahoo.com> writes:
> Dag-Erling Sm=F8rgrav <des@des.no> writes:
> > You cannot read the content of powered-off DRAM.
> Yes, that it is true.  _I_ cannot read powered-off DRAM...  But my
> feathered friends beyond the seven mountains with bird-like heads
> and big muscled chests and arms and legs and a super-duper-computer
> (abbr.: CIA) could possibly do that...

I very much doubt it.  DRAM needs to be continuously refreshed, and
loses its state within milliseconds of losing power.

> At least I saw that in TV (CSI Wanne-Eickel or so), how they read from a
> overwritten hard disc shreddered with a "laser"...

Umm, first, CSI is fiction; second, unlike DRAM, a hard disk is
designed to retain information when power is switched off.

DES
--=20
Dag-Erling Sm=F8rgrav - des@des.no