TheCodeBreakers
Militaire Fran-false. This book demolished the lingering myth of chamber
analysis, demonstrated the crucial role of errors and of torrents of
ciphertext, and generally crystallized the lessons of World War I and
catalyzed the evolution of the cryptology of today.
Five years after the influential little book was published, Sweden set
up a cryptologic bureau. It was headed by Colonel C. G. Warburg, a
gentleman who had fallen off a horse, broken both arms and legs, and
needed a sinecure. He proved as incompetent in cryptology as in
equitation, and was replaced by a naval officer who won the respect of
the experts who later served under him. During the late 1930s Gylde'n
gave many talks on cryptanalysis to Swedes. He also sowed the seeds of
a valuable cooperation With the other Scandinavian countries when he
lectured in Oslo and stimulated Captain Roscher-Lund to set up
Norway's first cryptologic office. In 1939, during a 12-hour war game,