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Date:      Thu, 18 Nov 1999 21:04:33 +0000 (GMT)
From:      Jonathon McKitrick <jcm@dogma.freebsd-uk.eu.org>
To:        peter.jeremy@alcatel.com.au
Cc:        TrouBle <trouble@netquick.net>, security@freebsd.org, questions@freebsd.org
Subject:   Re: secure filesystem wiping
Message-ID:  <Pine.BSF.4.02A.9911182103340.6933-100000@dogma.freebsd-uk.eu.org>
In-Reply-To: <99Nov19.074604est.40354@border.alcanet.com.au>

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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?
-jm



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