This is the Enigma machine

Building Enigma machine…

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Explore Enigma

This is the Enigma machine

The German military used Enigma during World War II to send encrypted messages. Polish, British, and French cryptanalysts used weaknesses in the machine and its operating procedures to decrypt intercepted communications.

Building Enigma machine…EnterLearn the Enigma's history

Enigma in useWartime photographs

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was pressed.

Geheim!Nicht ins Flugzeug mitnehmen!

OKH-Maschinenschlüssel A Nr. 39Nr. 00014

| Datum | Walzenlage | Ringstellung | Grundstellung | Steckerverbindungen | Kenngruppen | | ----- | ---------- | ------------ | ------------- | ------------------- | ----------- |

Left··Middle··Right··

Sheet reference & procedure

Click or tap a rotor window to set its letter.

AAA

Left rotor

A–Z↑↓

Set a letter with A–Z or the up and down arrow keys. You can also drag the letter up or down.

Done

Geheim!Nicht ins Flugzeug mitnehmen!

OKH-Maschinenschlüssel A Nr. 39Nr. 00014

| Datum | Walzenlage | Ringstellung | Grundstellung | Steckerverbindungen | Kenngruppen | | ----- | ---------- | ------------ | ------------- | ------------------- | ----------- |

9 / 10 cables connected

Sheet reference & procedure

Geheim!Nicht ins Flugzeug mitnehmen!

OKH-Maschinenschlüssel A Nr. 39Nr. 00014

| Datum | Walzenlage | Ringstellung | Grundstellung | Steckerverbindungen | Kenngruppen | | ----- | ---------- | ------------ | ------------- | ------------------- | ----------- |

Try choosing a rotor and its position, or continue.

IIIIIIIVVVIVIIVIII

Geheim!Nicht ins Flugzeug mitnehmen!

OKH-Maschinenschlüssel A Nr. 39Nr. 00014

| Datum | Walzenlage | Ringstellung | Grundstellung | Steckerverbindungen | Kenngruppen | | ----- | ---------- | ------------ | ------------- | ------------------- | ----------- |

Click an alphabet ring to change its setting.

Press any letter key to follow the current.

Lesson controls

Expand Space

AAA

Left ring setting

A–Z↑↓

Done

Type on your keyboard press keys on the Enigma machine.

I will help you write your first encrypted telegram.

Press Enter to send

Send encrypted messageEnterReset

Morse key

The operator sends the lamp letters in Morse. Enigma itself does not transmit.

These teaching instruments represent the separate radio transmission step. Morse plays at 12 words per minute.

Encrypted message: No letters yet

Recovered message: No letters yet