Enigma Sim. Manual

ENIGMA CIPHER MACHINE SIMULATOR 7.0.6

About the Enigma Simulator

The German Enigma machine is the most famous example of

the battle between codemakers and codebreakers. Never before

has the fate of so many lives been so influenced by one

cryptographic machine, as the Enigma did in the Second World

as they were used during World War II from 1939 until 1945. The

internal wiring of all rotors is identical to those used by the Heer,

Luftwaffe and Kriegsmarine. This simulator is therefore fully

compatible with the real Enigma machine and you can decipher

original messages and encipher your own messages.

You can use the Enigma simulator in exactly the same way as a

German signal trooper would have done during WW2. The

hands-on approach and realistic graphics ensure an authentic

feeling. You can open the machine, change the internal settings,

Enigma. More information on the Enigma machine is found at the Cipher Machines & Cryptology website:

http://users.telenet.be/d.rijmenants

This manual is copyrighted. Reproduction of its content is allowed only after explicit permission of the author.

© Dirk Rijmenants 2004 - 2013

Content

1. The Enigma Key Settings

2. Message Procedures

Wehrmacht Enigma I

Kriegsmarine Enigma M3

1. The Enigma Key Settings

You will notice that the mouse pointer changes into a little hand when you move over places where you can select

or click something. To call the Enigma simulator menu, move the mouse to the little icon in the top right corner of

the machine [1].

Click the power switch [2] (Wehrmacht) or one of the locks [3] (Kriegsmarine M3/M4) to open the Enigma. The

interior of the machine will become visible, showing the rotor cradle compartment at the top of the machine and a

rotor box, containing the unused spare rotors, at the bottom.

Selecting the Reflector (Umkehrwalze or UKW)

1 Wehrmacht (Heer & Luftwaffe)

B 3 5 normal

2 Wehrmacht (Heer & Luftwaffe)

C 3 5 normal

3 Kriegsmarine M3 B 3 5 normal + 3 double notched

4 Kriegsmarine M3 C 3 5 normal + 3 double notched

Changing the Rotors (Walzen)

To change one or more rotors, click on a rotor [5] in the rotor cradle to lift it out of the Enigma machine. The rotor

will be placed on top of the machine. Below a Werhmacht model with one extracted rotor.

Click on an empty place [6] in the box with spare rotors, at the bottom of the machine, to put the extracted rotor in

the spare rotors box.

Adjusting the Ring Setting (Ringstellung)

You can adjust the ring setting (Ringstellung) of a rotor when it is extracted from the machine. Once it is placed

on top of the machine, you can adjust the ring setting by clicking the upper [7] or lower [8] half of the displayed

rotor. When the ring is adjusted, click on an empty place at the desired location in the rotor cradle to place that

rotor in the machine.

You might find it easier to lift out all rotors from the rotor cradle and put them all into the box with spare rotors first,

Connecting the Plugs (Stecker) on the Plugboard (Steckerbrett)

To connect plugs from one socket to another (to switch the letter connections) you must click in the area of the

plugs [10], at the bottom of the Enigma.

The plugboard or 'Steckerbrett' will appear. Simply click the desired socket [11] and then click the socket that you

want to connect it to [12]. To clear a connection, just click one of the plugs [13] of a pair and both plugs will

disappear. After finishing the plug settings you can return to the Enigma top view by clicking the keys [14] above

the plugboard.

Kriegsmarine)

Setting the Rotor Start Position (Spruchschlussel)

On the main screen you can change the start position of the rotors by clicking the upper [15] or lower [16] half of

the rotor thumb wheels. You can save the start position temporarily by pressing the INS key, and retrieved these

rotor positions later by pressing the HOME key.

The Text Box

You can display the plaintext and ciphertext together in a little text box at the bottom of the Enigma by clicking the

lock [18] on the wooden box. Use the DEL or Backspace keys to clear this text box. Click again on the lock to

hide the text box. This text box is useful when processing large pieces of text.