Tutte and Flowers – Bletchley Park’s Lost Heroes

It all started with the German Lorenz machine – Hitler’s state of the art encrpyting communications machine – Enigma had been broken in 1941, but this time his new machine was almost un-decypherable The Lorenz SZ40, SZ42a and SZ42b were … Continue reading Tutte and Flowers – Bletchley Park’s Lost Heroes