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Cryptography & Ciphers

Enigma Cipher Processor

Apply Enigma with explicit key, format, and algorithm settings. Enter the data and key material, choose the parameters, then review the result.

Tool workspace

Your input stays in this browser.

Add the required input to continue.

Needs input

You can run the tool again after any change.

Options

Remove non-alphabet letters and group output

Your result appears here

Apply Enigma with explicit key, format, and algorithm settings. Enter the data and key material, choose the parameters, then review the result.

This tool runs open-source code from CyberChef by GCHQ (Apache License 2.0). See open-source credits.

Enigma Cipher Processor uses three- or four-rotor machine simulation to process the supplied input. It transforms letters through rotors, reflector, and plugboard. Resetting the same initial positions supports the reverse transformation.

It transforms letters through rotors, reflector, and plugboard. Resetting the same initial positions supports the reverse transformation. Processing runs in the browser for this catalog category, so the result depends on the supplied bytes and settings. Processing runs in the browser.

This tool performs the selected algorithm locally; it does not provide application trust or key management.

Instructions

  1. Provide text or data for this tool.
  2. Record every rotor, ring, initial value, reflector, and plugboard pair. This applies to Enigma Cipher Processor.
  3. Reset to the original initial values before processing ciphertext. This applies to Enigma Cipher Processor.

Example

Input: Use "HELLO", the 3-rotor model, default rotor order and ring settings, and an empty Plugboard.

Settings: Enigma Cipher Processor: Model selects three or four rotors; ring settings and initial values are separate. Strict output removes nonletters and groups the ciphertext.

Result: It transforms letters through rotors, reflector, and plugboard. Resetting the same initial positions supports the reverse transformation. Processing runs in the browser for this catalog category, so the result depends on the supplied bytes and settings.

Limits

  • Enigma Cipher Processor: Strict output loses spaces and punctuation.
  • Enigma Cipher Processor: This historical machine simulation is not suitable for protecting secrets.

Questions

What input does Enigma Cipher Processor accept?

Enigma Cipher Processor accepts text. Encipher/decipher with the WW2 Enigma machine. Enigma was used by the German military, among others, around the WW2 era as a portable cipher machine to protect sensitive military, diplomatic and commercial communications. The standard set of German military rotors and reflectors are provided. To configure the plugboard, enter a string of connected pairs of letters, e.g. AB CD EF connects A to B, C to D, and E to F. This is also used to create your own reflectors. To create your own rotor, enter the letters that the rotor maps A to Z to, in order, optionally followed by < then a list of stepping points. This is deliberately fairly permissive with rotor placements etc compared to a real Enigma (on which, for example, a four-rotor Enigma uses only the thin reflectors and the beta or gamma rotor in the 4th slot). More detailed descriptions of the Enigma, Typex and Bombe operations can be found here.

Which settings does Enigma Cipher Processor provide?

Enigma Cipher Processor provides controls for Model, 3-rotor, 4-rotor, Left-most (4th) rotor, Left-most rotor ring setting, Left-most rotor initial value, Left-hand rotor, Left-hand rotor ring setting, Left-hand rotor initial value, Middle rotor, Middle rotor ring setting, Middle rotor initial value, Right-hand rotor, Right-hand rotor ring setting, Right-hand rotor initial value, Reflector, Plugboard, Strict output.

What does Enigma Cipher Processor return?

Enigma Cipher Processor returns text. Encipher/decipher with the WW2 Enigma machine. Enigma was used by the German military, among others, around the WW2 era as a portable cipher machine to protect sensitive military, diplomatic and commercial communications. The standard set of German military rotors and reflectors are provided. To configure the plugboard, enter a string of connected pairs of letters, e.g. AB CD EF connects A to B, C to D, and E to F. This is also used to create your own reflectors. To create your own rotor, enter the letters that the rotor maps A to Z to, in order, optionally followed by < then a list of stepping points. This is deliberately fairly permissive with rotor placements etc compared to a real Enigma (on which, for example, a four-rotor Enigma uses only the thin reflectors and the beta or gamma rotor in the 4th slot). More detailed descriptions of the Enigma, Typex and Bombe operations can be found here.