linux-kernel - Re: encrypted hibernation (was Re: Hibernation considerations)

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Message-ID: <20070821072917.GA7258@elf.ucw.cz>
Date:	Tue, 21 Aug 2007 09:29:18 +0200
From:	Pavel Machek <pavel@....cz>
To:	"Dr. David Alan Gilbert" <linux@...blig.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Vojtech Pavlik <vojtech@...e.cz>, seife@...e.de,
	LKML <linux-kernel@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"Huang, Ying" <ying.huang@...el.com>,
	Jeremy Maitin-Shepard <jbms@....edu>,
	Kyle Moffett <mrmacman_g4@....com>,
	Nigel Cunningham <nigel@...el.suspend2.net>,
	pm list <linux-pm@...ts.linux-foundation.org>, david@...g.hm,
	Al Boldi <a1426z@...ab.com>
Subject: Re: encrypted hibernation (was Re: Hibernation considerations)

Hi!

> > > > > > > Two things which I think would be nice to consider are:
> > > > > > >    1) Encryption - I'd actually prefer if my luks device did not
> > > > > > >        remember the key accross a hibernation;
> > 
> > Why exactly (assuming that the hibernation image is encrypted)?
> 
> I was assuming the hibernation image was not encrypted.
> Certainly if it meant a penalty during normal operation (e.g. encrypted swap)
> it wouldn't be.

uswsusp works the way you want. Don't encrypt normal swap, and uswsusp
will still be encrypted.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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