Date: Thu, 18 Nov 1999 22:24:51 -0700 From: Wes Peters <wes@softweyr.com> To: Jonathon McKitrick <jcm@dogma.freebsd-uk.eu.org> Cc: peter.jeremy@alcatel.com.au, TrouBle <trouble@netquick.net>, security@FreeBSD.ORG, questions@FreeBSD.ORG Subject: Re: secure filesystem wiping Message-ID: <3834DF23.3416C163@softweyr.com> References: <Pine.BSF.4.02A.9911182103340.6933-100000@dogma.freebsd-uk.eu.org>
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Jonathon McKitrick wrote:
>
> On Fri, 19 Nov 1999, Peter Jeremy wrote:
>
> >This isn't technically possible. You can't securely wipe data from a
> >disk using the disks own R/W head/electronics (which is the only way
> >to preserve intact files).
>
> Why isn't it possible to read unallocated sectors and write back sectors
> full of garbage, or 0xFF?
It is, but that won't erase the disk, at least not well enough that someone
who knows what they're doing can't get it back.
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
wes@softweyr.com http://softweyr.com/
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