retrofitting LUKS encryption on installed system

[J.Witvliet at mindef.nl]

Top-post cause of BB :-(
Private keys (if stored locally), for outgoing traffic, should reside in the users home-dir.
Passwords should be replaced multi-factor strong auth's: card/token plus PIN.
Any alterations of filesystem beyond /home can be detected+reported.

Full disc encryption on a athom demands some extra patience :-)


----- Oorspronkelijk bericht -----
Van: Bill Davidsen [mailto:davidsen at tmr.com]
Verzonden: Saturday, June 29, 2013 10:07 PM W. Europe Standard Time
Aan: Community support for Fedora users <users at lists.fedoraproject.org>
Onderwerp: Re: retrofitting LUKS encryption on installed system

J.Witvliet at mindef.nl wrote:
> -----Original Message-----
> From: users-bounces at lists.fedoraproject.org [mailto:users-bounces at lists.fedoraproject.org] On Behalf Of Fred Smith
> Sent: Friday, June 28, 2013 3:42 PM
> To: users at lists.fedoraproject.org
> Subject: retrofitting LUKS encryption on installed system
>
> I've got a F19 installation that I'd like to turn into a fully encrypted
> system with LUKS.
>
> There are many howtos on the web for encrypting a partition, but they
> all show doing it to /home.
> -----Original Message-----
>
> No, just re-install.
> One partition with /boot and another with an encrypted volume-group, holding /, swap and the rest.
>
> But before embarking on that trip, do you really need full disk encryption?
> I mean, the content of /usr is on any fedora-cd ;-) And when up-and-running, everything is unlocked.
>
> The only valid reason I can think about, is that other people have physically access to your machine and could get root-access by booting from cd/dvd, and might alter your system.
>
If they have secret access they can install evil devices, but if you are 
protecting against theft (laptops) or someone with a search warrant (NSA) comes 
and takes your drives.

> It surely works, but at a performance price. And the certainty that you have to enter the LUKS-key each time you boot.
>
The only safe place to store password info is in your head. If one other person 
has it it's not a secret, so you have to decide if losing the data is worse than 
having someone else get it. That's a policy decision, on-technical.
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-- 
Bill Davidsen <davidsen at tmr.com>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot
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