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adds TOC as well as second basic enigma pic
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lubeskih committed Aug 23, 2019
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##### Table of Contents

- [Introduction](#introduction)
- [Demystifying the Enigma](#demystifying-the-enigma)
- [Basic Enigma](#basic-enigma)
- [A Current's Path](#current-path)
- [How hard is it to break Enigma?](#breaking-enigma)
- [Enigma Models](#models)
- []()

### Introduction

Welcome to the **Enigma Operator's Field Manual**. This manual purpose is to demystify the Enigma machine, the basics of the inner working of the machine, as well as operating it using a [computer simulator](https://enigma.lh.mk).
Welcome to the **Enigma Operator's Field Manual**. This manual's purpose is to demystify the Enigma machine, to uncover the inner working of the machine, as well as operating it using a [computer simulator](https://enigma.lh.mk).

The simulator is faithful to the workings of the following Enigma models:

Expand All @@ -30,35 +38,22 @@ That being said, the machine had only mechanised the basic operations of substit

The ciphers it produced were supposed to be unbreakable even by someone in possession of the machine.

##### The Basic Enigma
#### Basic Enigma


For the sake of simplicity, the diagram has been drawn for an alphabet of only eight letters, although in fact the Enigma worked on the ordinary 26-letter alphabet.

It shows the state of the machine at some particular moment in its use. The lines marked correspond to current-carrying wires.

| ![space-1.jpg](img/Enigma-1.jpg) |
|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|
| <small>*Current passing from the EKW, throughout the Rotors, reflecting itself at the UKW and back to a different path which ends up again, at the EKW.*<br> Found in [Andrew Hodges'](https://www.synth.co.uk/) book **Alan Turing: The Enigma**, digitalized by [Hristijan Lubeski](https://who.lh.mk).</small> |

| ![space-1.jpg](img/Enigma-1.jpg) |
|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|
| <small>*Current passing from the EKW, throughout the Rotors, reflecting itself at the UKW and back to a different path which ends up again, at the EKW.*<br><br> *Found in [Andrew Hodges'](https://www.synth.co.uk/) book **Alan Turing: The Enigma**, digitalized by [Hristijan Lubeski](https://who.lh.mk)*.</small> |

A simple switch system at the input has the effect that if a key (say the B keys) is depressed, a current flows (as shown in the diagram by bold) lines and lights up a bulb in the output display panel (in this case, under the letter D). For the hypothetical 8-letter Enigma, the next state of the machine would be:

[NEXT STATE PICTURE]

##### Glossary of Technical Terms:

- `Tastatur` - Keyboard
- `Steckerbrett` - Plugboard
- `Grundstellung` - Ground / Initial settings
- `Ringstellung` - Ring settings
- `Maschineneinstellung` - Machine settings
- `Lampen` - Lamps
- `Walzenlage` - Wheel Order
- `Umkehrwalze (UKW)` - Reversing drum / Reflector Wheel
- `Stator / Entrittswalze (ETW)` - Static Wheel

### Enigma I
A simple switch system at the input has the effect that if a key (say the B keys) is depressed, a current flows (as shown in the diagram by bold) lines and lights up a bulb in the output display panel (in this case, under the letter D). For the hypothetical 8-letter Enigma, the next state of the machine would be:

The `Enigma I` was developed around 1927/29 by Chriffrier­maschinen AG (later: Heimsoeth und Rinke) In Berlin (Germany) for the German Army (Reichswehr, later: Wehrmacht) 1 and introduced in 1932. [1]
| ![space-1.jpg](img/Enigma-2.jpg) |
|:--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|
| <small>*Current passing from the EKW, throughout the first rotor who's path just change, throughout the rest of the rotors, reflecting itself at the UKW and back to a different path which ends up again, at the EKW.*<br><br> *Found in [Andrew Hodges'](https://www.synth.co.uk/) book **Alan Turing: The Enigma**, digitalized by [Hristijan Lubeski](https://who.lh.mk)*.</small> |

Back to the simulator:
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