aenig4: aenig4 (Enigma M4 Cipher Machine Emulator) aenig4: aenig4: aenig4 emulates the Enigma M4 cipher machine used by the U-boot aenig4: division of the German Navy during World War II. It can be used as aenig4: well to emulate the Enigma I machine (M1, M2, M3). aenig4: aenig4: https://jorgicor.niobe.org/aenig4 aenig4: aenig4: aenig4: aenig4: