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).
See the Crypto Museum for more info about the machine.aenig4 is free software. Read the license.
For bug reports or suggestions, write me at firstname.lastname@example.org . Bug reports are much appreciated.