From: Pavel Machek <pavel@ucw.cz>
To: Jeremy Maitin-Shepard <jeremy@jeremyms.com>
Cc: Nigel Cunningham <ncunningham@crca.org.au>,
tuxonice-devel@lists.tuxonice.net, linux-kernel@vger.kernel.org,
Rafael Wysocki <rjw@sisk.pl>
Subject: Re: [TuxOnIce-devel] RFC: Suspend-to-ram cold boot protection by encrypting page cache
Date: Sat, 4 Jul 2009 04:57:55 +0200 [thread overview]
Message-ID: <20090704025755.GA1500@ucw.cz> (raw)
In-Reply-To: <87hbxn78o6.fsf@jeremyms.com>
On Wed 2009-07-08 03:47:53, Jeremy Maitin-Shepard wrote:
> Pavel Machek <pavel@ucw.cz> writes:
>
> [snip]
>
> > I believe uswsusp could be used rather easily. Just modify s2disk to
> > encrypt image in ram without writing it out, then decrypt it from ram
> > and resume... it should be interesting hack.
>
> As far as I understand, that would be completely useless since the image
> that would be encrypted would just be a copy of what would still remain
> in memory.
Yes... so next step would be kernel call that would erase all the
pagecache and anonymous pages. You would still leave some data in
kernel structures, but that would be quite hard to fix.
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2009-07-08 10:48 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-01 6:07 Jeremy Maitin-Shepard
2009-07-01 6:24 ` [TuxOnIce-devel] " Nigel Cunningham
2009-07-01 6:43 ` Jeremy Maitin-Shepard
2009-07-01 9:09 ` Nigel Cunningham
2009-07-01 15:55 ` Rafael J. Wysocki
2009-07-01 20:57 ` Jeremy Maitin-Shepard
2009-07-01 22:41 ` Rafael J. Wysocki
2009-07-01 22:58 ` Nigel Cunningham
2009-07-01 23:06 ` Jeremy Maitin-Shepard
2009-07-02 5:14 ` U Kuehn
2009-07-02 5:47 ` Jeremy Maitin-Shepard
2009-07-02 16:12 ` Rafael J. Wysocki
2009-07-04 2:44 ` Pavel Machek
2009-07-08 10:47 ` Jeremy Maitin-Shepard
2009-07-04 2:57 ` Pavel Machek [this message]
2009-07-08 11:09 ` Jeremy Maitin-Shepard
2009-07-09 10:14 ` Pavel Machek
2009-07-10 7:05 ` Jeremy Maitin-Shepard
2009-07-11 22:10 ` Pavel Machek
2009-07-01 12:21 ` Jens Gustedt
2009-07-01 20:40 ` Jeremy Maitin-Shepard
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