Gentoo Archives: gentoo-dev

From: Stefan Behte <craig@g.o>
To: gentoo-dev@l.g.o
Subject: Re: [gentoo-dev] RFC: Gentoo GPG key policies
Date: Wed, 20 Feb 2013 00:35:55
Message-Id: 51241A31.7070005@gentoo.org
In Reply to: [gentoo-dev] RFC: Gentoo GPG key policies by "Robin H. Johnson"
1 -----BEGIN PGP SIGNED MESSAGE-----
2 Hash: SHA1
3
4 Just some quick thoughts on this:
5
6 > 2. root key & signing subkey of EITHER: 2.1. DSA, 1024 or 2048 bits
7 > 2.2. RSA, >=2048 bits
8
9 I don't really agree. From your own link
10 (https://we.riseup.net/riseuplabs+paow/openpgp-best-practices#dont-use-pgp-mit-edu):
11
12 "Many people still have 1024-bit DSA keys. You really should consider
13 transitioning to a stronger bit-length and hashing algo. This size is
14 known now to be within Well Funded Organizations’ ability to break.
15 Also the hashing algo is showing its age."
16
17 Some more opinions from different studies: keylength.com.
18
19 1024 DSA keys seem pretty short to me. Surely it might be inconvenient
20 for some (2-3? please write a mail here!) people with smart cards. But
21 then again, especially people going through the hell of using a
22 physical token would understand the need for decent crypto. ;)
23
24 I think key rotation is overdoing it and pretty annoying. Better use a
25 non-annoying, long key from the start?
26
27 > 4. If you intend to sign on a slow alternative-arch, you may find
28 > adding a DSA1024 subkey significantly speeds up the signing.
29
30 How slow is that actually? Does it make signing very inconvenient?
31 Maybe someone with a slow machine can write about performance and the
32 "annoyence-factor"... ;)
33
34 Best regards,
35
36 Craig
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38 Version: GnuPG v2.0.19 (GNU/Linux)
39 Comment: Using GnuPG with undefined - http://www.enigmail.net/
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41 iEYEARECAAYFAlEkGjEACgkQuiczp+KMe7SkWACgrioKjFkuPwJOxUCmhGKcC4Ib
42 uyQAmwUfM7u3x6sD1rmQJrEjjUu7C6ok
43 =OyqH
44 -----END PGP SIGNATURE-----

Replies

Subject Author
Re: [gentoo-dev] RFC: Gentoo GPG key policies "Robin H. Johnson" <robbat2@g.o>