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/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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