In 1932, a 23-year-old Polish mathematician named Marian Rejewski accomplished what every intelligence service in Europe had tried and failed to do: he broke the German Enigma cipher machine. Using pure mathematics — specifically permutation group theory — Rejewski mathematically deduced the interna…
In 1932, 23-year-old Polish mathematician Marian Rejewski used permutation theory to reverse-engineer the German Enigma machine without ever seeing one. He built replica machines, cracked daily key settings, and created the Bomba. In July 1939 he handed all research to British intelligence inKabacki…
Before WWII, Vera Atkins was a Romanian-born librarian and socialite who spoke four languages and had a photographic memory. She joined SOE's French Section as an intelligence officer and personally recruited and managed 39 agents sent into occupied France — 13 of whom were women, highly unusual for…