Rudolf Schauffler

Rudolf Schauffler (born 11 August 1889 in Ulm– died 6 February 1968) was a German mathematician, who was most notable for being the nominal head of the Linguistics and Cryptanalysis section of Pers Z S, the Signal Intelligence Agency of the German Foreign Office before and during World War II.

Life Before World War I, Schauffler had been a schoolmaster after studying mathematics, physics and languages at the University of Tübingen and the Ludwig-Maximilians-Universität München. During the first world war, Schauffler worked as a cryptanalyst at the German army headquarters. After the war, Schauffler found the work of schoolmaster to be too difficult and decided to join Pers Z S. Schauffler was recruited by Kurt Selchow and joined on 1 December 1918.

Although he did not have a Doctor of Philosophy degree nor did he habilitate while in office, Schauffler was most definitely a real mathematician.

Very early in his career, he wrote two papers in 1917 and 1921 for the Mathematische Annalen mathematical research journal. After the war he wrote a thesis in 1941 but did not submit it until 1947 to Marburg University. The subject was on cryptography: An application of cyclic permutations and their theory (German: Eine Anwendung zyklischer Permutationen und ihre Theorie). It had not been submitted due to the contents being secret.

Elderly, not old, but broken by sickness and the ersatz food of the war years, he shuffled around his chilly apartment, barely able to put a pot of water on for tea. As rain dripped slowly from the gray sky, he ended our talk by saying, “A bridge builder can see what he has done for his countrymen, but we (German codebreakers) cannot tell whether our life was worth anything.”

Career

Initially, Schauffler worked on cryptographic metholologies. During the period from 1921 to 1923, Schauffler worked as part a team that included Werner Kunze on the development of a one-time pad system for the use by the Foreign Office. He later became interested in Chinese and Japanese languages while sharing an office with Emil Krebs, who taught him, eventually becoming a specialist in both languages over a period of twenty years. In 1923, he examined the rotor cipher machine, the Enigma machine, specifically the early design known as "Die Handelsmaschine" (The trading machine) and wrote a report explaining the dangers of decipherment.

He later edited the in-house journal, Scientific Writings of the Dahlem Special Service, (German:Wissenschaftliche Schriften des Sonderdienstes Dahlem).

In 1950, the Federal Foreign Office tasked Selchow along with Schauffler, Erich Hüttenhain and Heinz Kuntze to form a cryptographic service under the direction of Adolf Paschke that was called Section 114. The service was to act as a cypher bureau for the Central office of Encryption (ZfCh) that had been previously created in 1947 and was located at Camp King. In 1955, the unit was disbanded as West Germany was rearming, and a new unit was to be created. In 1956 all the equipment and resources of the unit were transferred to the Federal Intelligence Service (Germany). In 1989 the unit was renamed to ZFI . In 1991, it became the BSI (Federal Office for Information Security)