Re: linux filesystem and secure deletion

From: Nico Kadel-Garcia (nkadel@bellatlantic.net)
Date: 02/13/02 

From: "Nico Kadel-Garcia" <nkadel@bellatlantic.net>
Date: Wed, 13 Feb 2002 03:31:15 GMT

"Valdis Kletnieks" <valdis.kletnieks@vt.edu> wrote in message
news:94it923ctm.fsf@foo-bar-baz.cc.vt.edu...
> "Nico Kadel-Garcia" <nkadel@bellatlantic.net> writes:
>
> > Hmm. I just realized: operations that shorten the file will leave old
blocks
> > lying around, unflushed, unless the "shorten" process also zeros the
remains
> > of the file.
>
> And as has been pointed out - you don't even have a guarantee that your
> "zero the file" routine will write zeros to the same disk blocks as the
> original file.
>
> It's a lot harder than you think. ;)

Yeah, but you gotta start *somewhere*. Spending 5 years developing a
brilliant implementation that involves re-writing the file system is a *bad*
idea....

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