NODE 559a6f96Re: Need program pointers
cwedgwood@cybernet.co.nz (Chris Wedgwood)Mon, 28 Nov 94 04:26:09 PST
storm@marlin.ssnet.com wrote:
_______________________________________________________________________
I presently use Xtree Gold. It has a DoD and 6 pass Wash Disk
feature for writing over usused areas of a disk/drive. So far I
have been unsucessfull at recovering any data after Wash Disk
with Norton Utilities or PC Tools.
If there is a weakness in Wash Disk I'd like to hear about it.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Actually XtreeGold doesn't wipe disks very well. It simply creates a
file in (in root) as big as there is free space on the disk. This is
fine provided the file have rubbish in it - but with XTG its all
blank.... wash you disks then do and undelete from root and you will
find a (usually large) file. Look at it - its all blank....
Because the data is all blank (zeros) an anomalie search would produce
probably ALL of the data that was there originally.....
I have a program (written by me) that writes pseudo-random mess to
the disk for a specified number of times. I am also working on another
program which clears any data that remians in the last clusters of a
file (i.e. past the EOF point). DOS 7 will do this automoatically I'm
told (haven't lood and the beta is too messy to bother with).
Chris
P.S. Sorry for extra spaces in the quoting... my comm prrogram is
somewhat broken....
NODE 6d1703f7Re: Need program pointers
Mats Bergstrom <asgaard@sos.sll.se>Mon, 28 Nov 94 09:58:23 PST
> I have a program (written by me) that writes pseudo-random mess to
> the disk for a specified number of times. I am also working on another
A simple easy-to-get file over-writer (around 5 times if I
remember correctly) for DOS is tbdel.com, part of the TBAV
(ThunderByte Anti Virus) SW package.
Mats
NODE e441357bRe: Need program pointers
"Ian Farquhar" <ianf@sydney.sgi.com>Mon, 28 Nov 94 19:57:52 PST
On Nov 28, 6:51pm, Mats Bergstrom wrote:
> A simple easy-to-get file over-writer (around 5 times if I
> remember correctly) for DOS is tbdel.com, part of the TBAV
> (ThunderByte Anti Virus) SW package.
What worries me about most of these PC "DoD" file erasers is that
I am reliably informed that on at least one occasion, 11 generations
of data have been recovered from a generic SCSI hard disk. It was
a very unusual circumstance (suspicion of data leakage from a very
high security site), but I find it difficult to take 5-pass programs
very seriously.
Ian.
NODE 95ddfe9aRe: Need program pointers
khijol!erc (Ed Carp [Sysadmin])Mon, 28 Nov 94 22:08:53 PST
> On Nov 28, 6:51pm, Mats Bergstrom wrote:
> > A simple easy-to-get file over-writer (around 5 times if I
> > remember correctly) for DOS is tbdel.com, part of the TBAV
> > (ThunderByte Anti Virus) SW package.
>
> What worries me about most of these PC "DoD" file erasers is that
> I am reliably informed that on at least one occasion, 11 generations
> of data have been recovered from a generic SCSI hard disk. It was
> a very unusual circumstance (suspicion of data leakage from a very
> high security site), but I find it difficult to take 5-pass programs
> very seriously.
The NSA has done the same thing with a tunneling electron microscope. That
was a published report, too...
--
Ed Carp, N7EKG Ed.Carp@linux.org, ecarp@netcom.com
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