From owner-freebsd-security  Tue Jul 13 11:10:23 1999
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To: "Allen Smith" <easmith@beatrice.rutgers.edu>
Cc: Wes Peters <wes@softweyr.com>,
	FreeBSD Security <freebsd-security@FreeBSD.ORG>
Subject: Re: Secure Deletion 
In-reply-to: Your message of "Tue, 13 Jul 1999 13:54:59 EDT."
             <9907131354.ZM8203@beatrice.rutgers.edu> 
Date: Tue, 13 Jul 1999 20:08:51 +0200
Message-ID: <25695.931889331@critter.freebsd.dk>
From: Poul-Henning Kamp <phk@critter.freebsd.dk>
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Just in case anybody wants to do this "RIGHT":

UFS/FFS will issue B_FREEBUF strategy calls, which a device driver
could turn into "secure delete" operations should the drive support
this, or multiple over-writes if it doesn't.

In message <9907131354.ZM8203@beatrice.rutgers.edu>, "Allen Smith" writes:
>On Jul 13,  8:13am, Greg Black (possibly) wrote:
>> Wes Peters writes:
>> 
>> > Here's the source for the new, improved
>> > version if anyone wants to test it themselves.
>> > 
>> > Unless anyone has strenuous objections, I'll make this into a port and
>> > commit it (as soon as I learn how to make a port).
>
>One other thing... the paper isn't quite clear about the randomization 
>of order of the deterministic passes. Should the program be doing the
>deterministic passes in a random order, with the random ones before
>and after? Or is that just talking about that you do the multiple-byte 
>deterministic passes in each of the possible orders (which probably
>should be randomized with respect to each other)?
>
>	-Allen
>
>-- 
>Allen Smith				easmith@beatrice.rutgers.edu
>	
>
>
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--
Poul-Henning Kamp             FreeBSD coreteam member
phk@FreeBSD.ORG               "Real hackers run -current on their laptop."
FreeBSD -- It will take a long time before progress goes too far!


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