- Arne Beurling
Arne Carl-August Beurling (
February 3, 1905- November 20, 1986) was a mathematicianand professorof mathematicsat Uppsala University(1937-1954) and later at the Institute for Advanced Studyat Princeton, USA.
Arne Beurling worked extensively in
harmonic analysis, complex analysisand potential theory.
In 1940 he single-handedly deciphered and reverse-engineered an early version of the
Siemens and Halske T52also known as the "Geheimfernschreiber" (one of the " Fish cyphers") used by Nazi Germany, and created a device that enabled Swedento decipher German teleprintertraffic passing through Sweden from Norwayon a cable. In this way, Swedish authorities knew about Operation Barbarossabefore it occurred. This became the foundation for the Swedish National Defence Radio Establishment("FRA"). (The cypher in the Geheimfernschreiber is generally considered to be more complex than the cypher used in the Enigma machines.Fact|date=June 2008)
Arne Beurling's great-grandfather was
Per Henric Beurling(1758 (or 1763) - 1806), who founded a high quality clock factory in Stockholm in 1783.
*Bengt Beckman. "Codebreakers: Arne Beurling and the Swedish crypto program during World War II." Translated by Kjell-Ove Widman. Providence, RI: American Mathematical Society, c2002.
* [http://frode.home.cern.ch/frode/ulfving/ulfving.html Arne Beurling and the success of Swedish Signal Intelligence]
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