From: Arno Wagner <arno@wagner.name>
To: dm-crypt@saout.de
Subject: Re: [dm-crypt] Dmcrypt and hibernate key disclosure
Date: Tue, 11 Jan 2011 10:11:48 +0100 [thread overview]
Message-ID: <20110111091147.GA4260@tansi.org> (raw)
In-Reply-To: <20110111000816.GC31936@rz>
On Tue, Jan 11, 2011 at 01:08:16AM +0100, Richard wrote:
> On Fri, Jan 07, 2011 at 09:40:09AM +0800, Aaron Lewis wrote:
> > Hi,
> > If i hibernate with an device opened , before i resume , an image was
> > written on swap partition , will there be a problem with my secret key's
> > disclosure ?
> >
> > Just an off-line attack , if swap is not encrypted.
>
> swap must be encrypted. Works nicely on Fedora, one boot partition and a
> big encrypted dm0 device with several LVM partitions on top of it.
>
Well, if you are not asked for the swap encryption key on
wakeup, basically everything is open. That would be a rather
obvious implementation error though.
If you get asked, then it depends on the implementation, but
they do have the right idea.
Arno
--
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@wagner.name
GnuPG: ID: 1E25338F FP: 0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F
----
Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
If it's in the news, don't worry about it. The very definition of
"news" is "something that hardly ever happens." -- Bruce Schneier
next prev parent reply other threads:[~2011-01-11 9:19 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-07 1:40 [dm-crypt] Dmcrypt and hibernate key disclosure Aaron Lewis
2011-01-07 2:49 ` Arno Wagner
2011-01-07 4:08 ` Bryan Kadzban
2011-01-07 4:39 ` Arno Wagner
2011-01-08 4:45 ` Bryan Kadzban
2011-01-08 11:53 ` Heiko Rosemann
2011-01-08 14:55 ` iggy
2011-01-07 10:42 ` Heiko Rosemann
2011-01-11 0:08 ` Richard
2011-01-11 9:11 ` Arno Wagner [this message]
2011-01-11 10:31 ` Milan Broz
2011-01-11 16:35 ` Richard
2011-01-11 17:08 ` Milan Broz
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