John Tiltman
Brigadier John Hessell Tiltman MC (25 May 1894 – 10 August 1982) was a British Army officer who worked in intelligence, often at or with the Government Code and Cypher School (GC&CS) starting in the 1920s. His intelligence work was largely connected with cryptography, and he showed exceptional skill at cryptanalysis. His work in association with Bill Tutte on the cryptanalysis of the Lorenz cipher, the German teleprinter cipher, called "Tunny" at Bletchley Park, led to successful attack methods. It was to exploit those methods that Colossus, the first digital programmable electronic computer, was designed and built.
Read more about John Tiltman: Biography
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