full-disclosure - Secure Delete for Windows

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Message-ID: <01f701c61baa$c0cd5430$0100a8c0@nuclearwinter>
Date: Tue Jan 17 21:52:47 2006
From: fd at g-0.org (GroundZero Security)
Subject: Secure Delete for Windows

Our software works for NTFS and FAT filesystems and in the new version you can also
wipe the free space to get rid of data that is left on unallocated portions of the disk.

It was tested against encase which is one of the most popular recovery tools.
(apparently has been used to recover data from disks that have been recovered from 
the WTC incident although we can not confirm that)

We could not recover any data in our lab tests. We tested 7 different recovery tools,
but encase is the most popular and we dont want to advertise for the rest too :)

Our application has not only the DOD wiping standard, but also peter gutmanns algorythm 
with 38 random overwrites, which is the most secure wiping methode we know of.
shred is ok but not good enough to really securely clean data. 

----- Original Message ----- 
From: "Michael Holstein" <michael.holstein@...ohio.edu>
To: <full-disclosure@...ts.grok.org.uk>
Sent: Tuesday, January 17, 2006 9:50 PM
Subject: Re: [Full-disclosure] Secure Delete for Windows

> > An exe?  No source???  Just "setup.exe"????  Are you crazy?
> 
> Or .. get GNU coreutils for windows :
> 
> http://gnuwin32.sourceforge.net/packages/coreutils.htm
> 
> and just use 'shred'.
> 
> (although 'man shred' specifically makes note about journaled 
> filesystems -- which NTFS is. I have not forensically analyzed the 
> effectiveness of this tool on a specific file -- only on a block device).
> 
> SysInternals also offers a freebie tool called 'sdelete'. Source for 
> that is also available :
> 
> http://www.sysinternals.com/Utilities/SDelete.html
> 
> (and in the discussion about 'how sdelete works' they reference the same 
> problem regarding journeled filesystems).
> 
> If the emminently wise gent from GroundZero wishes to comment on how his 
> perticular product addresses these issues, then that might be fodder for 
> the list (versus the ongoing flames).
> 
> Regards,
> 
> Michael Holstein CISSP GCIA
> Cleveland State University
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