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Re: [debian-knoppix] Include wipe into Knoppix

Hello Christian,

Sorry, I'm not going to include wipe, because it's useless.

We had this discussion before, but I'm summarizing it anyways. ;-)

Depending on which filesystem you use, erasing a file by copying random
data over it is not going to physically destroy the file contents on
your harddisk. Journaling filesystems for example create new blocks
when you overwrite a file, rather than overwriting existing ones. So,
even doing a dd if=/dev/urandom of=file_to_be_shred (which is what wipe
does), does not necessarily do what you expect.

Concerning tapes: use dd. it is faster and present on every Unix

-Klaus Knopper

On Fri, Nov 01, 2002 at 11:08:58AM +0100, Christian Wenke wrote:
> Hi,
> I would be more then happy, if wipe could be part of Knoppix in the future. 
> This should not be a Problem, I think, since wipe is only a tiny package.
> cw@neso:~ -> dpkg -s wipe
> Package: wipe
> Status: install ok installed
> Priority: extra
> Section: utils
> Installed-Size: 124
> Maintainer: Thomas Schoepf <schoepf@debian.org>
> Version: 0.16-8
> Depends: libc6 (>= 2.2.4-4)
> Description: Secure file deletion
>  Recovery of supposedly erased data from magnetic media is easier than what
>  many people would like to believe. A technique called Magnetic Force
>  Microscopy (MFM) allows any moderately funded opponent to recover the last
>  two or three layers of data written to disk. Wipe repeatedly writes special
>  patterns to the files to be destroyed, using the fsync() call and/or the
>  O_SYNC bit to force disk access.
>  .
>  Homepage: http://gsu.linux.org.tr/wipe/
> Regards,
> 	Christian
> -- 
> Christian Wenke
> Bereich Embedded Systems
> Escherweg 2 - 26121 Oldenburg - Germany
> E-Mail: christian.wenke@offis.de - URL: http://www.offis.de/
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