During World War II he made a brilliant and fundamental advance in Cryptanalysis of the Lorenz cipher, a major German cipher system, which had a significant impact on the Allied victory in Europe.
He made a brilliant and fundamental advance in Cryptanalysis of the Lorenz cipher. This was during World War II. The Lorenz cipher was a major German cipher system. A brilliant and fundamental advance in Cryptanalysis of the Lorenz cipher had a significant impact on the Allied victory in Europe. The Lorenz cipher was a major German cipher system.