Re: encrypted hibernation (was Re: Hibernation considerations)

["Dr. David Alan Gilbert" <linux@treblig.org>]

* Pavel Machek (pavel@ucw.cz) wrote:
> 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; I want to be forced to
> > > >        reenter the phrase.  However I don't know what the best thing
> > > >        to do to partitions/applications using the luks device is.
> > > 
> > > Encryption is possible with both the userland hibernation (aka uswsusp) and
> > > TuxOnIce (formerly known as suspend2).  Still, I don't consider it as a "must
> > > have" feature for a framework to be generally useful (many users don't use it
> > > anyway).
> > 
> > If a user uses an encrypted filesystem, then he also needs an encrypted
> > swap and encrypted hibernation image: Otherwise the fileystem encryption
> > is not very useful.
> 
> Actually, we can do most of that stuff already. 
> 
> We can encrypt filesystems, encrypt swaps (LVM), and encrypt hibernation.

But can you do what my original question was; find a way to lose a luks
encrypted device key and cleanly unmount the filesystem that was
using it?  (and preferably put it all back together after resume).

Dave
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