Читать книгу Engineering Hitler's Downfall - Gwilym Roberts - Страница 34

In mid-1941 the Germans started using the more sophisticated Lorenz cypher machines; some 12 months later, the German High Command began to use the system for its high-level communications with its Army Commands. The Lorenz signal traffic was known as Tunny by the Bletchley Park cryptanalysts. As the result of an error by a German transmitter in late August 1941, by January 1942 John Tiltman and Bill Tutte had worked out the complete logical structure of the cypher machine, thereby enabling Tunny to be decoded. This remarkable piece of reverse engineering was later described as ‘one of the greatest intellectual feats of World War 2’.