The theory behind Enigma can be traced back for many centuries, even as early as the 4th Century BC by the Romans4. Even Thomas Jefferson had invented a ciphering machine consisting of numerous rings on the same shaft, which is similar to the design of Enigma. Arthur Scherbius patented Enigma in 1918 for businesses1. The German’s military later caught interest, and stopped commercial production in 1923 and it became for military use only4. Enigma basically functioned by a letter being pressed on a component similar to a typewriter, which would light up a

both sets where put in the Bomby, and the machine would go through all combinations and stop when it got a possible match4. With the codes acquired and the replica, Rejewski decoded most of the German’s messages.

“No power of genius has ever yet had the smallest success in explaining existence. The perfect enigma remains.”

Unfortunately, the Germans added two more rotors to the Enigma in 19381. Still only three rotors worked at once, but the rotors electrically changed4. Exhausted from the years of hard work, and currently preparing themselves for an invasion from the Germans, the Polish had to leave Poland and share their hard work with the French and British. This is when all of the effort accomplished by the Polish, led by Rejewski, fell onto the lap of Alan Turing.

For added security, a plugboard or Steckerboard was added. This device would switch letters. For instance, if T was pressed, the plugboard might switch T with G, which

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