Last update: Wednesday 03rd of December 2008


Enigma

The plugboard, keyboard, lamps and finger-wheels of the rotors emerging from the inner lid of a three-rotor German military Enigma machine (version with labels)

The Enigma machine was a cipher machine used to encrypt and decrypt secret messages. More precisely, Enigma was a family of related electro-mechanical rotor machines — comprising a variety of different models.

The Enigma was used commercially from the early 1920s on, and was also adopted by the military and governmental services of a number of nations—most famously by Nazi Germany before and during World War II.

The German military model, the Wehrmacht Enigma, is the version most commonly discussed. The machine has gained notoriety because Allied cryptologists were able to decrypt a large number of messages that had been enciphered on the machine. Decryption was made in 1932 by Polish cryptographers Marian Rejewski, Jerzy Różycki and Henryk Zygalski from Cipher Bureau. In mid-1939 reconstruction and decryption methods were delivered from Poland to Britain and France. The intelligence gained through this source—codenamed ULTRA—was a significant aid to the Allied war effort. The exact influence of ULTRA is debated, but a typical assessment is that the end of the European war was hastened by two years because of the decryption of German ciphers.

Although the Enigma cipher has cryptographic weaknesses, in practice it was only in combination with other significant factors (mistakes by operators, procedural flaws, an occasional captured machine or codebook, luck) that Allied codebreakers were able to decipher messages.

This article discusses the Enigma machine itself: its components and its procedures. For the history and techniques of how Enigma was broken, see Cryptanalysis of the Enigma. For a discussion of how Enigma-derived intelligence was put to use, see ULTRA.

The Enigma cipher machine
  • Enigma machine
    • Enigma rotor details
  • Cryptanalysis of the Enigma
    • Cyclometer
    • Perforated sheets
    • Bomba
    • Bombe
  • Ultra

Enigma Mp3 Downloads

Download audio files (mp3 and wma) with Enigma Songs using these download websites. The list will be updated perciodically.

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    Enigma in the news

    Auction for a very rare and legendary German WWII chifer machine ENIGMA in mint conditon, all original, nor restored and complete. Full working museum condition.

    Quote poem that sums up the Paris enigma.

    Scientists’ hunt for the cause of depression has implicated so many suspects and found so many treatments with different mechanisms that the condition remains an enigma. Now researchers at the Stanford University School of Medicine have identified one unifying principle that could explain how a range of causes and treatments for depression converge






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