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Date:      Thu, 17 Jan 2008 11:02:10 +0200
From:      Marc Silver <>
To:        Wojciech Puchar <>
Cc:        "Jason C. Wells" <>, freebsd general questions <>, Peter Boosten <>
Subject:   Re: Gutman Method on Empty Space
Message-ID:  <>
In-Reply-To: <>
References:  <> <> <> <> <>

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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:

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'.


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