From: Jeremy Maitin-Shepard <jeremy@jeremyms.com>
To: Pavel Machek <pavel@ucw.cz>
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: Wed, 08 Jul 2009 04:09:41 -0700 [thread overview]
Message-ID: <87d48b77nu.fsf@jeremyms.com> (raw)
In-Reply-To: <20090704025755.GA1500@ucw.cz> (Pavel Machek's message of "Sat, 04 Jul 2009 04:57:55 +0200")
Pavel Machek <pavel@ucw.cz> writes:
> 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.
Okay. (This does still require the same assumption as TuxOnIce
regarding the page cache, though.)
--
Jeremy Maitin-Shepard
next prev parent reply other threads:[~2009-07-08 11:01 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
2009-07-08 11:09 ` Jeremy Maitin-Shepard [this message]
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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