Military products from Lorenz during WWII included land-based and airborne radars, two-way radio sets, wire recorders, radio tubes, and Germany’s most secure communications device, the Lorenz cipher machine.
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Called the Schlüsselzusatz (cipher attachment), the Lorenz cipher was an in-line addition to their standard teleprinter.
Its interception was originally concentrated at the Foreign Office Y Station operated by the Metropolitan Police at Denmark Hill in Camberwell, London.
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Tutte did this with the original teleprinter 5-bit Baudot codes, which led him to his initial breakthrough of recognising a 41 character repetition.
From 1st July 1942 on, this team switched and was tasked with breaking the German High Command’s most top-level code Tunny after Bill Tutte successfully broke Tunny system in Spring 1942.
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The one using the Lorenz SZ 40/42, code-named Tunny at the Government Code & Cypher School at Bletchley Park, was used for high-level traffic between German High Command and field commanders.
The Lorenz cipher machine had twelve wheels, and was thus most advanced, complex, faster and far more secure than the three-wheeled Enigma.