Marian Rejewski Biography

Uses permutation theory to reconstruct the German Enigma machine's internal wiring.

Achieves a breakthrough in mechanized cipher analysis before the Second World War.

Is assigned to the Polish Cipher Bureau's Enigma problem and applies mathematical permutation theory to the machine.

Reconstructs the internal wiring of the German military Enigma using mathematics and intelligence material.

Uses the reconstructed machine and recovered daily settings to read German military Enigma traffic.

Designs the cyclometer to catalogue Enigma permutation characteristics.

Accelerates recovery of daily cipher settings through mechanical calculation.

Develops the cyclometer to catalogue Enigma permutation characteristics and accelerate recovery of daily settings.

Designs the Polish bomba kryptologiczna to automate part of the search for Enigma daily settings.

Adapts Polish methods after Germany adds two extra rotors, greatly increasing possible Enigma rotor orders.

Explains the mathematical reconstruction of Enigma and Polish key-recovery methods to allied cryptanalysts.

Meets Turing in France and discusses Polish Enigma methods after the Cipher Bureau's evacuation.