aenig4 - Enigma M4 Cipher Machine Emulator
aenig4 emulates the Enigma M4 cipher machine used by the U-boot division of
the German Navy during World War II. It can be used as well to emulate the
Enigma I machine (M1, M2, M3).
For more info about the machine, see: http://cryptomuseum.com/crypto/enigma/m4/index.htm
aenig4 is free software. See the file
COPYING for copying conditions.