ADFGVX encryption tool.
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Damien Goutte-Gattat 811608c043 Merge branch 'develop' 7 anni fa
lib Add asprintf replacement module 7 anni fa
po Update PO files 7 anni fa
src Update help message 7 anni fa
.gitignore Add gettext-based I18N support 10 anni fa
AUTHORS Initial commit 11 anni fa
COPYING Convert to GNU General Public License v3 11 anni fa
Makefile.am Don't generate man page from DocBook 7 anni fa
NEWS Update NEWS file 7 anni fa
README Add README 8 anni fa
adfgvx.1.in Update man page 7 anni fa
configure.ac Bump version number to 0.2.2 7 anni fa
sample.key Added a sample key in distributed files 11 anni fa

README

adfgvx - ADFGVX cipher tool
===========================

Description
-----------
Adfgvx is an implementation of the “ADFGVX” cipher invented by Fritz
Nebel in 1918 and used by the Germans in the last months of World War I.

WARNING: Do NOT use this program to encrypt sensitive informations! To
quote Bruce Schneier: “There are two kinds of cryptography in this
world: cryptography that will stop your kid sister from reading your
files, and cryptography that will stop major governments from reading
your files.” (Bruce Schneier, “Applied Cryptography: Protocols,
Algorithms, and Source Code in C”). The ADFGVX cipher may prevent your
kid sister from reading your files, but that’s about the best it can do
nowadays. Even by 1918 standards, the cipher was not robust enough to
prevent French cryptanalysts to break it. I only wrote this program
because it was something fun to do.

This implementation of ADFGVX can encrypt either a 36 letters plaintext
alphabet into a 6 letters ciphertext alphabet (like the original ADFGVX
cipher), or a 64 letters plaintext alphabet into a 8 letters ciphertext
alphabet (this second mode of operation notably allows to encrypt a
Base64-encoded plaintext).

Copying
-------
Adfgvx is distributed under the terms of the GNU General Public License,
version 3 or higher. The full license is included in the COPYING file of
the source distribution.


Homepage and contact
--------------------
The repository containing the latest source code is available at
<git://git.incenp.org/adfgvx.git>.

To contact the author, use the following address:
Damien Goutte-Gattat <dgouttegattat@incenp.org>