"Bruno Baron von Freytag-Löringhoff (born June 11, 1912 in Bilderlingshof near Riga – died February 28, 1996 in Tübingen) was a German philosopher, mathematician and epistemologist. He was also a university lecturer at the University of Tübingen. During World War II, Freytag-Löringhoff worked as a mathematician in the In 7/VI, that was the signals intelligence agency of the Wehrmacht and worked with Fritz Menzer on the testing of cryptographic devices and procedures. Freytag-Löringhoff worked specifically on the testing of the m-40 cipher machine. His most important contributions to the history of logic and mathematics was his studies and descriptions from 1957, of the calculating machine, built by Wilhelm Schickard." - (en.wikipedia.org 30.01.2020)
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