secure deletion

[Eivind Eklund]

On Fri, May 21, 1999 at 03:34:56PM -0400, Thomas Valentino Crimi wrote:
> Excerpts from mail: 21-May-99 Re: secure deletion by Eivind Eklund at FreeBSD.OR 
> > Either tunefs or chflags - it would be relatively expensive, so if you
> > only need it for some data, it is probably better to have more
> > fine-grained control than per-FS.
> 
>   Might I also suggest a 'normal' user option for one particular file to
> be securely wiped?

It is not possibly to securely delete a file after data has been
written to it unless the wish to do so has been indicated to the
kernel from the start of the file's life time.  We do de-fragmentation
while the FS is running (or at least that's what I understood the
dorealloc code to do).

Eivind.
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