[Announce] GnuPG 2.0.23 released

Werner Koch wk at gnupg.org
Tue Jun 3 11:29:11 CEST 2014


We are pleased to announce the availability of a new stable GnuPG-2
release: Version 2.0.23.  This is a maintenance release with a few
new features.

The GNU Privacy Guard (GnuPG) is GNU's tool for secure communication
and data storage.  It can be used to encrypt data, create digital
signatures, help authenticating using Secure Shell and to provide a
framework for public key cryptography.  It includes an advanced key
management facility and is compliant with the OpenPGP and S/MIME

GnuPG-2 has a different architecture than GnuPG-1 (e.g. 1.4.14) in
that it splits up functionality into several modules.  However, both
versions may be installed alongside without any conflict.  In fact,
the gpg version from GnuPG-1 is able to make use of the gpg-agent as
included in GnuPG-2 and allows for seamless passphrase caching.  The
advantage of GnuPG-1 is its smaller size and the lack of dependency on
other modules at run and build time.  We will keep maintaining GnuPG-1
versions because they are very useful for small systems and for server
based applications requiring only OpenPGP support.

GnuPG is distributed under the terms of the GNU General Public License
(GPLv3+).  GnuPG-2 works best on GNU/Linux and *BSD systems but is
also available for other Unices, Microsoft Windows and Mac OS X.

What's New in 2.0.23

 * gpg: Reject signatures made using the MD5 hash algorithm unless the
   new option --allow-weak-digest-algos or --pgp2 are given.

 * gpg: Do not create a trustdb file if --trust-model=always is used.

 * gpg: Only the major version number is by default included in the
   armored output.

 * gpg: Print a warning if the Gnome-Keyring-Daemon intercepts the
   communication with the gpg-agent.

 * gpg: The format of the fallback key listing ("gpg KEYFILE") is now more
   aligned to the regular key listing ("gpg -k").

 * gpg: The option--show-session-key prints its output now before the
   decryption of the bulk message starts.

 * gpg: New %U expando for the photo viewer.

 * gpgsm: Improved handling of re-issued CA certificates.

 * scdaemon: Various fixes for pinpad equipped card readers.

 * Minor bug fixes.

Getting the Software

Please follow the instructions found at https://www.gnupg.org/download/
or read on:

GnuPG 2.0.23 may be downloaded from one of the GnuPG mirror sites or
direct from ftp://ftp.gnupg.org/gcrypt/gnupg/ .  The list of mirrors
can be found at https://www.gnupg.org/mirrors.html .  Note that GnuPG
is not available at ftp.gnu.org.

On the FTP server and its mirrors you should find the following files
in the gnupg/ directory:

  gnupg-2.0.23.tar.bz2 (4196k)

      GnuPG source compressed using BZIP2 and its OpenPGP signature.

  gnupg-2.0.22-2.0.23.diff.bz2 (53k)

      A patch file to upgrade a 2.0.22 GnuPG source tree.  This patch
      does not include updates of the language files.

Note, that we don't distribute gzip compressed tarballs for GnuPG-2.
A Windows version will eventually be released at https://gpg4win.org .

Checking the Integrity

In order to check that the version of GnuPG which you are going to
install is an original and unmodified one, you can do it in one of
the following ways:

 * If you already have a trusted version of GnuPG installed, you
   can simply check the supplied signature.  For example to check the
   signature of the file gnupg-2.0.23.tar.bz2 you would use this command:

     gpg --verify gnupg-2.0.23.tar.bz2.sig

   This checks whether the signature file matches the source file.
   You should see a message indicating that the signature is good and
   made by that signing key.  Make sure that you have the right key,
   either by checking the fingerprint of that key with other sources
   or by checking that the key has been signed by a trustworthy other
   key.  Note, that you can retrieve the signing key using the command

     finger wk ,at' g10code.com

   or using a keyserver like

     gpg --keyserver keys.gnupg.net --recv-key 4F25E3B6

   The distribution key 4F25E3B6 is signed by the well known key


 * If you are not able to use an old version of GnuPG, you have to verify
   the SHA-1 checksum.  Assuming you downloaded the file
   gnupg-2.0.23.tar.bz2, you would run the sha1sum command like this:

     sha1sum gnupg-2.0.23.tar.bz2

   and check that the output matches the first line from the
   following list:

c90e47ab95a40dd070fd75faef0a05c7b679553b  gnupg-2.0.23.tar.bz2
e02cfab2bc046f9fac89eef098c34f58b5745d20  gnupg-2.0.22-2.0.23.diff.bz2


The file gnupg.info has the complete user manual of the system.
Separate man pages are included as well; however they have not all the
details available in the manual.  It is also possible to read the
complete manual online in HTML format at


or in Portable Document Format at

  https://www.gnupg.org/documentation/manuals/gnupg.pdf .

The chapters on gpg-agent, gpg and gpgsm include information on how
to set up the whole thing.  You may also want search the GnuPG mailing
list archives or ask on the gnupg-users mailing lists for advise on
how to solve problems.  Many of the new features are around for
several years and thus enough public knowledge is already available.

Almost all mail clients support GnuPG-2.  Mutt users may want to use
the configure option "--enable-gpgme" during build time and put a "set
use_crypt_gpgme" in ~/.muttrc to enable S/MIME support along with the
reworked OpenPGP support.


Please consult the archive of the gnupg-users mailing list before
reporting a bug <https://gnupg.org/documentation/mailing-lists.html>.
We suggest to send bug reports for a new release to this list in favor
of filing a bug at <https://bugs.gnupg.org>.  We also have a dedicated
service directory at:


The driving force behind the development of GnuPG is the company of
its principal author, Werner Koch.  Maintenance and improvement of
GnuPG and related software takes up most of their resources.  To allow
him to continue this work he kindly asks to either purchase a support
contract, engage g10 Code for custom enhancements, or to donate money:

Maintaining and improving GnuPG is costly.  For more than a decade,
g10 Code GmbH, a German company owned and headed by GnuPG's principal
author Werner Koch, is bearing the majority of these costs.  To help
them carry on this work, they need your support.  See



We have to thank all the people who helped with this release, be it
testing, coding, translating, suggesting, auditing, administering the
servers, spreading the word, and answering questions on the mailing

Happy Hacking,

  The GnuPG Team

Die Gedanken sind frei.  Ausnahmen regelt ein Bundesgesetz.
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