On Mon, Mar 9, 2009 at 10:32 PM, Mads <m...@lsitec.org.br> wrote:

> I know of procedures and programs to erase files securely from disks,
> Guttman did a paper on that....

Yes, but that paper is over ten years old. In the meanwhile, disk
designs and perhaps encoding schemes have changed, journaling
file systems have become much more common and, for all I
know the attack technology may have changed too.

Is there a more recent analysis or is Guttman still the
best reference?

Sandy Harris,
Quanzhou, Fujian, China

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