Emulating Navy M3 and M4 Enigma Machines.
This Enigma machine emulator is faithful to the workings of both the Navy M3 and M4 Enigma machines (used by the German navy during World War 2), and you can decipher original German messages.
The only difference between a real Enigma machine and this emulator is the way the machine is arranged and how you set it up. In the emulator all the wheel settings are visible (instead of opening up the Enigma), the plugboard is above the lampboard and there is no keyboard - you use your computer's keyboard to enter letters into a single input field. Also, there is continuous feedback of the clear text and cipher text, to save you having to note down each letter from the lampboard. This means that the lampboard is effectively redundant, but I have included for authenticity and fun!
I suggest that you first familiarise yourself with how an Enigma machine works, or at least how the emulator works, before you plunge in and start making secret messages. If you would like to know more, then there is plenty of further reading material available.