Re: Wipe2fs - utility to wipe unused space in ext2/3

From: /dev/rob0 (rob0_at_gmx.co.uk)
Date: 08/18/03 

Date: Mon, 18 Aug 2003 06:25:36 -0700

In article <bhqgfr$q21$1@gemini.ntu.edu.tw>, Chuan-kai Lin wrote:
> wipe all unused space in ext2/3 filesystems. This program can be used
> to make sure that your deleted data can no longer be recovered by
> computer forensics tools with reasonable efforts.

Thank you. I went to the site but did not review the code. Can you tell
us how your program does this? Some time back we had a rather lengthy
discussion here about disk wiping, and the bottom line appeared to be
that it is VERY difficult to protect against physical examination of
disk platters, which might possibly be available to governments.

It's rather easy to foil filesystem-based recovery. Even zeroes can do
that.

My principal criticism of the site is that there is no link to any in-
depth discussion of the issues. I'd hate (as I suppose you would too)
for someone to get a false sense of security from using your software.
    http://www.google.com/search?q=secure%20deletion%20magnetic%20media
The first link is Peter Gutmann's detailed study, which explains a
great deal about forensic data recovery methods.

Good luck with your project. 

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