Hi there,
On Thu, Jan 17, 2008 at 09:43:46AM +0100, Wojciech Puchar wrote:
> how? even single write is enough
Not according to the paper that Gutmann wrote:
http://www.usenix.org/publications/library/proceedings/sec96/full_papers/gutmann/
In short, he says that if you know how the data itself was overwritten
it can be recovered. If I recall, the DoD standard for the deletion of
data is to overwrite it 3 times.
Obviously it all comes down to how important the data is that you're
removing, but a single write is not enough if the data needs to be
disposed of 'securely'.
Cheers,
Marc
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