[118300] in Cypherpunks
Re: Steganos - Wiping Data
daemon@ATHENA.MIT.EDU (Jonathan Stafford)
Fri Sep 24 20:35:59 1999
Date: Fri, 24 Sep 1999 20:13:09 -0400 (EDT)
From: Jonathan Stafford <jestaff2@unity.ncsu.edu>
To: Sean Roach <roach_s@mail.intplsrv.net>
cc: cypherpunks@Algebra.COM
In-Reply-To: <3.0.6.32.19990925043922.0082ca80@mail.intplsrv.net>
Message-ID: <Pine.SOL.4.05.9909242011510.17246-100000@eos00du.eos.ncsu.edu>
MIME-Version: 1.0
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Reply-To: Jonathan Stafford <jestaff2@unity.ncsu.edu>
Less effective than sandblasting, but couldn't you also try wiping the
tracks bordering the incriminating track?
Jonathan
--
This message is meaningless and subject to change.
> At 11:15 PM 9/23/99 -0400, John A. Limpert wrote: >
> >
> >I thought that only applied to old hard drives that used open loop,
> >stepper motor positioners. Don't all modern hard drives use closed
> >loop, embedded servo, voice coil positioners?
> >
> >I remember having to wait for drive temperature stabilization before
> >low level formatting some of the original Maxtor SCSI drives.
> >
> >----------
> >>From: Ragnar Hojland Espinosa <ragnar@lightside.dhis.org> >>
> >>
> >> On Tue, Sep 21, 1999 at 11:12:12PM -0000, Jeff T Gordon wrote: >>>
> >>> 3.encrypt each set of doc's sepratly useing differnt keys
> >>> 4.Wipe original file with 23 passes
> >>
> >> You will have more success wiping out files if the HD temperature
> >> at which your write and the temperature at which you wipe are
> >> similar [0]
> >>
> >> [0] Obviously temperature at boot time and post boot time arent
> >> similar.
> >
> I'm probably well out of my depth here but remember that almost all
> things expand as they become warmer. Hard drive platters wouldn't be
> any exception. Granted, for regular use, if the data track is wide
> enough, then it shouldn't matter that the data is being read or
> written off by 1/100,000th of an inch, but if you are worried about
> someone reconstructing your data, that little bit of varience when
> the incriminating data was overwritten may mean that there is a
> 1/100,000th of an inch wide data track with the data still written on
> it. I guess that is why the true paranoids advise sandblasting the
> platters when they are decommissioned.
>
> Sean Roach
>
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