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authorwagner <wagner@tansi.org>2013-04-25 00:08:42 +0200
committerwagner <wagner@tansi.org>2013-04-25 00:08:42 +0200
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--- a/FAQ
+++ b/FAQ
@@ -136,13 +136,17 @@ A. Contributors
* 1.5 Who wrote this?
- Current FAQ maintainer is Arno Wagner <arno@wagner.name>. Other
- contributors are listed at the end. If you want to contribute, send
- your article, including a descriptive headline, to the maintainer,
- or the dm-crypt mailing list with something like "FAQ ..." in the
- subject. You can also send more raw information and have me write
- the section. Please note that by contributing to this FAQ, you
- accept the license described below.
+ Current FAQ maintainer is Arno Wagner <arno@wagner.name>. If you
+ want to send me encrypted email, my current PGP key is DSA key
+ CB5D9718, fingerprint 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D
+ 9718.
+
+ Other contributors are listed at the end. If you want to contribute,
+ send your article, including a descriptive headline, to the
+ maintainer, or the dm-crypt mailing list with something like "FAQ
+ ..." in the subject. You can also send more raw information and
+ have me write the section. Please note that by contributing to this
+ FAQ, you accept the license described below.
This work is under the "Attribution-Share Alike 3.0 Unported"
license, which means distribution is unlimited, you may create
@@ -309,13 +313,24 @@ A. Contributors
Side-note: That has limited value against the authorities. In
civilized countries, they cannot force you to give up a crypto-key
- anyways. In the US, the UK and dictatorships around the world,
- they can force you to give up the keys (using imprisonment or worse
- to pressure you), and in the worst case, they only need a
- nebulous "suspicion" about the presence of encrypted data. My
- advice is to either be ready to give up the keys or to not have
+ anyways. In quite a few countries around the world, they can force
+ you to give up the keys (using imprisonment or worse to pressure
+ you, sometimes without due process), and in the worst case, they
+ only need a nebulous "suspicion" about the presence of encrypted
+ data. Sometimes this applies to everybody, sometimes only when you
+ are suspected of having "illicit data" (definition subject to
+ change) and sometimes specifically when crossing a border. Note
+ that this is going on in countries like the US and the UK, to
+ different degrees and sometimes with courts restricting what the
+ authorities can actually demand.
+
+ My advice is to either be ready to give up the keys or to not have
encrypted data when traveling to those countries, especially when
- crossing the borders.
+ crossing the borders. The latter also means not having any
+ high-entropy (random) data areas on your disk, unless you can
+ explain them and demonstrate that explanation. Hence doing a
+ zero-wipe of all free space, including unused space, may be a good
+ idea.
Disadvantages are that you do not have all the nice features that
the LUKS metadata offers, like multiple passphrases that can be
@@ -545,6 +560,31 @@ A. Contributors
and half of it is the cipher key, the other half is the XTS key.
+ * 2.15 How do I Verify I have an Authentic cryptsetup Source Package?
+
+ Current maintainer is Milan Broz and he signs the release packages
+ with his PGP key. The key he currently uses is the "RSA key ID
+ D93E98FC", fingerprint 2A29 1824 3FDE 4664 8D06 86F9 D9B0 577B
+ D93E 98FC. While I have every confidence this really is his key and
+ that he is who he claims to be, don't depend on it if your life is
+ at stake. For that matter, if your life is at stake, don't depend
+ on me being who I claim to be either.
+
+ That said, as cryptsetup is under good version control, a malicious
+ change should be noticed sooner or later, but it may take a while.
+ Also, the attacker model makes compromising the sources in a
+ non-obvious way pretty hard. Sure, you could put the master-key
+ somewhere on disk, but that is rather obvious as soon as somebody
+ looks as there would be data in an empty LUKS container in a place
+ it should not be. Doing this in a more nefarious way, for example
+ hiding the master-key in the salts, would need a look at the
+ sources to be discovered, but I think that somebody would find that
+ sooner or later as well.
+
+ That said, this discussion is really a lot more complicated and
+ longer as an FAQ can sustain. If in doubt, ask on the mailing list.
+
+
3. Common Problems