This software is an exact simulation of the 3-rotor Wehrmacht (Heer and Luftwaffe) Enigma, the 3-rotor Kriegsmarine M3, also called Funkschlussel M, and the famous 4-rotor Kriegmarine M4 Enigma cipher machine, used during World War II from 1939 until 1945. The sim has a very authentic feeling with its hands-on approach. You can select between the three models, actually lift out and insert different rotors, adjust their ring setting and set up the plugboard.

The sounds are recorded from an actual Enigma. The internal wiring of all rotors is identical to those that were used by the Wehrmacht and Kriegsmarine. This simulator is therefore fully compatible with the various real Enigma models, and you can decrypt authentic wartime messages or encrypt and decrypt your own messages.

The program comes with a comprehensive 22-page helpfile, containing the manual, original wartime messages, the history of Enigma, the technical details of the machine, and a picture gallery. You can work with the most intriguing military crypto machine, and examine how it works and how it was operated. A true reference to Enigma, and an educational must!

Check out the Enigma Sim Manual to discover all the nuts and bolts of the software. All questions or feedback are welcome by e-mail or by visiting the Guestbook.

Runs on all Windows™ versions and with Wine on Linux or Parallels Desktop on MAC.

Download the Simulator

Download EnigmaSim v7.0.6 (Zip 3.1 MB)
Please check the readme file before installation.
Check the integrity of the downloaded software with SHA-256.

Discover also the TSEC/KL-7, US M-209 and Hagelin BC-52 cipher machine simulators!

Screenshots

Recent Updates

• Enigma Sim Manual edition 2022-02 This version is not included in the installation file! To add to the installed Enigma Sim, right-click link and save manual in Enigma installation folder (usually "C:\Program Files (x86)\ENIGMA") without changing the file name. This file contains the manual and updated contact information and links.

Useful adds

• Enigma Codebook Tool Create and print your own code books.

More on Enigma on this site

• The German Enigma Cipher Machine The history of Enigma, its development, use during the ware and cryptanalysis.
• Enigma Cipher Challenge Join the contest to decrypt 10 messages in a wartime context.
• The M4 Project (courtesy Stefan Krah) Breaking an authentic U-boat message and the story of U-264

Off-Site (opens in new tab)

• Enigma World Code Group Bruce Culp's excellent website, designed to join Enigma enthusiasts and globally exchange Enigma encrypted messages. Provides clear and simple instructions on how to encrypt and decrypt messages. Code books provided.
• Hamacher's Instruction Video showing the nuts and bolts of my Enigma simulator and explains the wartime procedure to encrypt messages.
  Important note: in this video, Hamacher uses the Kriegsmarine Enigma M3, but with the encryption procedure for the Wehrmacht/Heer Enigma I.
  
  

© Dirk Rijmenants 2004. Last changes: 21 December 2022

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