Gentoo Archives: gentoo-user

From: "Stéphane Guedon" <stephane@××××××××××.eu>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] crypt my home repository
Date: Mon, 02 Jan 2012 11:38:37
Message-Id: 201201021237.01284.stephane@22decembre.eu
In Reply to: Re: [gentoo-user] crypt my home repository by Florian Philipp
1 On Monday 02 January 2012 11:49:11 Florian Philipp wrote:
2 > Am 02.01.2012 09:07, schrieb Stéphane Guedon:
3 > > Hi all
4 > >
5 > > I may ask something already discussed, but I can't find any good
6 > > documentation. I am wondering of how to secure my home repository on my
7 > > laptop. I am thinking of cryptography and other things (the password
8 > > uncrypt the repository and allows to read files...).
9 > >
10 > > What tool to use for ? Anybody knows a good doc (in french would be
11 > > really good) ?
12 > >
13 > > I am not really paranoïd, but I work now in a quite important
14 > > environnement and want any data I get out to be secured...
15 >
16 > I recommend dm-crypt (a.k.a. cryptsetup-luks). It encrypts the block
17 > device under the actual file system. Gentoo wiki has some tutorials on
18 > it (although you don't need much of it): [1] [2]
19 >
20 > If you only want to encrypt your home partition, you only need to follow
21 > these steps:
22 >
23 > 1. Create an encrypted partition (see `man cryptsetup`)
24 > 2. Move /home/* over to it (don't forget backup)
25 > 3. Configure /etc/conf.d/dmcrypt
26 > 4. Add /etc/init.d/dmcrypt to boot runlevel
27 >
28 > Then the init script will ask you for the password at boot. dm-crypt
29 > allows multiple passwords per partition so that different users can have
30 > different passwords.
31 >
32 > The alternative to the dmcrypt init script is to use sys-auth/pam_mount.
33 > It allows you to use the login password to automatically decrypt a
34 > partition and mount it as /home/$user. [2] has a section about it.
35 > However, this breaks easily and is pretty hard to administrate if you
36 > have no experience with dm-crypt and pam. I recommend the first solution.
37 >
38 > [1]
39 > http://en.gentoo-wiki.com/wiki/SECURITY_System_Encryption_DM-Crypt_with_LUK
40 > S [2] http://en.gentoo-wiki.com/wiki/DM-Crypt
41 >
42 > Regards,
43 > Florian Philipp
44
45 Is this solution (the first one) easily integrated into some environnement
46 (kde) ?
47
48 I don't want to have numerous password (one for decrypt, one other to open the
49 desktop session as usual...), plus my wife would argue with some reason I am
50 always hacking the computer whereas we are just using it to look movies...
51 (she uses the computer also, but in a much more used way, so any solution has
52 to be comfortable to her too !)
53
54 --
55 Stéphane Guedon
56 http://www.22decembre.eu/
57 http://lectures.22decembre.eu/
58 carte de visite : http://www.22decembre.eu/downloads/Stephane-Guedon.vcf

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Replies

Subject Author
Re: [gentoo-user] crypt my home repository Florian Philipp <lists@×××××××××××.net>