Differences

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--- gnupg [2009/09/02 15:45] – created cangiani
+++ gnupg [2022/08/05 11:22] (current) – admin
@@ Line 1: / Line 1: @@
 ====== Privacy with GNU Privacy Guard ======
 ===== Use =====
 ==== General ====
 There is a lot of documentation about GnuPG on the [[http://www.gnupg.org/documentation/index.en.html|official web site]]. For the impatient, I suggest to read a very nice and compact tutorial that can be found [[http://www.dewinter.com/gnupg_howto/english/GPGMiniHowto.html|here]]. In particular, you should read the [[http://www.dewinter.com/gnupg_howto/english/GPGMiniHowto-1.html|Concepts]] and the [[http://www.dewinter.com/gnupg_howto/english/GPGMiniHowto-3.html|Using Keys]] chapters.
-Just a few obvious rules (that apparently are not that obvious to everybody ;-))
+<note>
+Just a few obvious rules... that apparently are not that obvious to everybody ;-)
   * to encrypt a message (file) for your personal use, use your own public key
   * to encrypt a message for a friend of yours, use his public key
   * to sign a message: use your private key
+  * you should be sure that you can trust your public keys. The ideal thing is to organize //key exchange parties// with your friends or at least, to ask your friends to confirm that the key you have is valid (e.g. by comparing key fingerprint that you obtain from ''gpg --list-keys --fingerprint'' on the phone  ).
+</note>
+Anyway, the very first thing to do is to create your own private/public key pair:\
+<code>
+# gpg --gen-key
+gpg (GnuPG/MacGPG2) 2.0.12; Copyright (C) 2009 Free Software Foundation, Inc.
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+Please select what kind of key you want:
+   (1) RSA and RSA (default)
+   (2) DSA and Elgamal
+   (3) DSA (sign only)
+   (4) RSA (sign only)
+Your selection? 2
+DSA keys may be between 1024 and 3072 bits long.
+What keysize do you want? (2048)
+Requested keysize is 2048 bits
+Please specify how long the key should be valid.
+= key does not expire
+      <n>  = key expires in n days
+      <n>w = key expires in n weeks
+      <n>m = key expires in n months
+      <n>y = key expires in n years
+Key is valid for? (0) 3
+Key expires at Sat Sep  5 16:59:34 2009 CEST
+Is this correct? (y/N) y
+GnuPG needs to construct a user ID to identify your key.
+Real name: Flash Gordon
+Email address: flash.gordon@gmail.com
+Comment: this is another test key
+You selected this USER-ID:
+    "Flash Gordon (this is another test key) <flash.gordon@gmail.com>"
+Change (N)ame, (C)omment, (E)mail or (O)kay/(Q)uit? O
+You need a Passphrase to protect your secret key.
+We need to generate a lot of random bytes. It is a good idea to perform
+some other action (type on the keyboard, move the mouse, utilize the
+disks) during the prime generation; this gives the random number
+generator a better chance to gain enough entropy.
+gpg: WARNING: some OpenPGP programs can't handle a DSA key with this digest size
+We need to generate a lot of random bytes. It is a good idea to perform
+some other action (type on the keyboard, move the mouse, utilize the
+disks) during the prime generation; this gives the random number
+generator a better chance to gain enough entropy.
+gpg: key 48C7AF6A marked as ultimately trusted
+public and secret key created and signed.
+gpg: checking the trustdb
+gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model
+gpg: depth: 0  valid:   2  signed:   0  trust: 0-, 0q, 0n, 0m, 0f, 2u
+gpg: next trustdb check due at 2009-09-03
+pub   2048D/48C7AF6A 2009-09-02 [expires: 2009-09-05]
+      Key fingerprint = 695D 354D E592 8677 50E5  5E62 DF8B 511A 48C7 AF6A
+uid                  Flash Gordon (this is another test key) <flash.gordon@gmail.ch>
+sub   2048g/E9BEF1D2 2009-09-02 [expires: 2009-09-05]
+</code>
 An handy way of sharing your public key is to upload it to a public key server like ''keys.gnupg.net''. This allows your friend to easily search and obtain your public key and vice-versa. To upload your public key, first decide which one to upload. Therefore list your keys
@@ Line 68: / Line 131: @@
-==== Mac ====
-{{ mail:noprivatekey.png?64|first dialog for GPG Keychain Access}}
-Setup your private key. Launch GPG Keychain Access. Normally, if you never used GnuPG before, you will probably be asked if you want to create or import your personal private/public key pair. Unless you already have a pair of keys (e.g. you generated it using command line ''gpg --gen-key'', click on //generate//. Follow the process and accept all default values. You will also be asked to set a password for your private key: **do not** use something trivial to guess otherwise all this is useless!
-{{ mail:pgpmailpreferences.png?64|GnuPG Mail preferences}}Your newly generated key will appear also as default Personal Key in the //Keys// section of the //PGP// tab of Mail preferences. You are now ready for sending encrypted and/or digitally signed messages with //Mail//.
-PGPMail is well documented in its [[http://www.sente.ch/software/GPGMail/French.lproj/GPGMail.html|official website]].
-==== Linux ====
-**TODO**
-===== Install =====
-==== Mac (Leopard) + Apple Mail ====
-  - Download and install the latest version of Mac GNU Privacy Guard v2.x from [[http://sourceforge.net/projects/macgpg2/files/|here]]. It is an installer package. Just double click on it and follow the instructions.
-  -  {{ mail:gnupgprefpane.png|GnuPG preference pane}} Download and install (just click on ''GnuPG.prefPane'') the latest version of GPGPreferences from [[http://sourceforge.net/projects/macgpg/files/|here]]. You will have a new item in System Preferences. Open it and have a look to the configuration. Eventually change the **Key Server** to ''keys.gnupg.net''.
-  - Download and install GPG Keychain Access also from [[http://sourceforge.net/projects/macgpg/files/|here]]. To install just drag the ''.app'' bundle in your ''/Application'' folder.
-  - Download and install [[http://sourceforge.net/projects/gpgmail/files/|GPGMail]]. You can install it by running (double clicking) the ''Install GPGMail.app'' script, or by copying the ''GPGMail.mailbundle'' in the ''Mail/Bundles/'' folder in your ''Library'' folder.
-==== Linux ====
-GnuPG is installed by default on most Linux machines.
-**TODO**