Enigma History
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Enigma History

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History of the Enigma machine and its importance in World War II.

History of the Enigma machine and its importance in World War II.

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Enigma History Enigma History Presentation Transcript

  • The Enigma Machine Overlake School January 16, 2002 Mike Koss
  • Battle of the Atlantic - World War II
    • The Germans used submarines to try to stop the Americans from sending war supplies to the British.
  • Submarine Tracking
    • The British tried to keep careful track of submarine locations to keep shipping convoys out of harms way.
  • Communication Secrecy
    • The Germans needed a way to secretly communicate with their submarines.
  • The Enigma Machine
    • The Germans adapted a machine for encoding all military communications which they believed to be unbreakable…but…
  • Code Breakers of Bletchley Park
    • The British assembled a team of mathematicians, crossword puzzle geniuses, and clerks to break the German codes.
  • First Computers Invented
    • Along the way, they invented the world’s first digital stored program computer to help them crack the hardest German codes.
    Colossus
  • Demo: Sending an Enigma Message
    • Set up today’s rotor settings from the published (secret) code book.
    • Chose a three-letter message key.
    • Encode the message key (twice: e.g., XYZ-XYZ).
    • Set rotors to message key setting.
    • Encode the message.
  • Demo: Receiving an Enigma Message
    • Set up today’s rotor settings from the published (secret) code book.
    • Decode the first 6 letters of the message to get the message key.
    • Set the rotors to the message key setting.
    • Decode the contents of the message.
  • How Enigma Works
    • Enigma uses a system of 3 or 4 “rotors” that electrically connect a keyboard to a “lamp-board”.
  • Scrambling Letters
    • Each letter on the keyboard is connected to a lamp letter that depends on the wiring and position of the rotors in the machine.
  • Other Machines
    • M-94: United States – Thomas Jefferson patented, used in civil war through WW II.
    • M-209: United States – used by WW II paratroopers.
    • NEMA: Swiss “New Machine” – a better Enigma.