Virtual SG-41

Virtual Schlüsselgerät 41

Virtual Schlüsselgerät 41
sg41.virtualcolossus.co.uk

Handle Position: 6 o'clock

Virtual Hagelin SG-41 Tutorial

Welcome to Virtual SG-41. This quick walkthrough will take you through a few of the ways to interact with this simulation.
Click on the top of the box to open it.

Import/Export SG-41 Settings

Import SG-41 Settings

Import an SG-41 settings file, (*.sgs)

Export SG-41 Settings File

This option will export the current SG-41 settings to a text file. Use this option to download the current key tables as an example text file.
You can then amend the pin settings putting a + for a set pin and o for a unset pin.

Export SG-41 Settings

Example Menus

A few example SG-41 key tables which you can load and try.
The Czech archives are from An example monthly table (Monatstafel) from Eugen Antal, Carola Dahlke & Robert Jahn (01 Dec 2025): Revealing secrets from WWII: the original German instructions of Schlüsselgerät 41, Cryptologia, DOI:10.1080/01611194.2025.2557311
The CryptoMuseum.com example is from the document Klaus Kopacz & Paul Reuvers, Schlüsselgerät 41 at www.cryptomuseum.com/crypto/sg41/