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Cryptography & Ciphers

SIGABA Cipher Processor

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

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Your input stays in this browser.

Add the required input to continue.

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Options

Your result appears here

Apply SIGABA 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.

SIGABA Cipher Processor uses cipher, control, and index rotor simulation to process the supplied input. It returns the selected encrypt or decrypt transformation using the three interacting rotor banks.

It returns the selected encrypt or decrypt transformation using the three interacting rotor banks. 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. Save rotor wiring, reversal flags, and initial values before encryption. This applies to SIGABA Cipher Processor.
  3. Use Decrypt with the same initial configuration for the reverse test. This applies to SIGABA Cipher Processor.

Example

Input: Use "HELLO" with SIGABA mode Encrypt and record all selected rotor settings.

Settings: SIGABA Cipher Processor: Configure five cipher rotors, five control rotors, and five index rotors. Cipher and control rotors have reversal controls; index rotors use numeric initial positions.

Result: It returns the selected encrypt or decrypt transformation using the three interacting rotor banks. Processing runs in the browser for this catalog category, so the result depends on the supplied bytes and settings.

Limits

  • SIGABA Cipher Processor: Recording only the five cipher rotors is insufficient for reproduction.
  • SIGABA Cipher Processor: This historical simulation supplies no modern authentication or key management.

Questions

What input does SIGABA Cipher Processor accept?

SIGABA Cipher Processor accepts text. Encipher/decipher with the WW2 SIGABA machine. SIGABA, otherwise known as ECM Mark II, was used by the United States for message encryption during WW2 up to the 1950s. It was developed in the 1930s by the US Army and Navy, and has up to this day never been broken. Consisting of 15 rotors: 5 cipher rotors and 10 rotors (5 control rotors and 5 index rotors) controlling the stepping of the cipher rotors, the rotor stepping for SIGABA is much more complex than other rotor machines of its time, such as Enigma. All example rotor wirings are random example sets. To configure rotor wirings, for the cipher and control rotors enter a string of letters which map from A to Z, and for the index rotors enter a sequence of numbers which map from 0 to 9. Note that encryption is not the same as decryption, so first choose the desired mode. Note: Whilst this has been tested against other software emulators, it has not been tested against hardware.

Which settings does SIGABA Cipher Processor provide?

SIGABA Cipher Processor provides controls for 1st (left-hand) cipher rotor, 1st cipher rotor reversed, 1st cipher rotor initial value, 2nd cipher rotor, 2nd cipher rotor reversed, 2nd cipher rotor initial value, 3rd (middle) cipher rotor, 3rd cipher rotor reversed, 3rd cipher rotor initial value, 4th cipher rotor, 4th cipher rotor reversed, 4th cipher rotor initial value, 5th (right-hand) cipher rotor, 5th cipher rotor reversed, 5th cipher rotor initial value, 1st (left-hand) control rotor, 1st control rotor reversed, 1st control rotor initial value, 2nd control rotor, 2nd control rotor reversed, 2nd control rotor initial value, 3rd (middle) control rotor, 3rd control rotor reversed, 3rd control rotor initial value, 4th control rotor, 4th control rotor reversed, 4th control rotor initial value, 5th (right-hand) control rotor, 5th control rotor reversed, 5th control rotor initial value, 1st (left-hand) index rotor, 1st index rotor initial value, 2nd index rotor, 2nd index rotor initial value, 3rd (middle) index rotor, 3rd index rotor initial value, 4th index rotor, 4th index rotor initial value, 5th (right-hand) index rotor, 5th index rotor initial value, SIGABA mode.

What does SIGABA Cipher Processor return?

SIGABA Cipher Processor returns text. Encipher/decipher with the WW2 SIGABA machine. SIGABA, otherwise known as ECM Mark II, was used by the United States for message encryption during WW2 up to the 1950s. It was developed in the 1930s by the US Army and Navy, and has up to this day never been broken. Consisting of 15 rotors: 5 cipher rotors and 10 rotors (5 control rotors and 5 index rotors) controlling the stepping of the cipher rotors, the rotor stepping for SIGABA is much more complex than other rotor machines of its time, such as Enigma. All example rotor wirings are random example sets. To configure rotor wirings, for the cipher and control rotors enter a string of letters which map from A to Z, and for the index rotors enter a sequence of numbers which map from 0 to 9. Note that encryption is not the same as decryption, so first choose the desired mode. Note: Whilst this has been tested against other software emulators, it has not been tested against hardware.