TheCodeBreakers
1943.)
In 1940 the cryptanalysts were divided by language, though some of
the mathematicians shifted from group to group. The four units were: No.
1, for Romance languages, primarily French and Italian, headed by
Gylden, who had spent ten years in France and was fluent in that
language; No. 2, for German, in which one of the brightest workers was
Carl-Otto Segerdahl, a young mathematician; No. 3, for English, which
attacked American and British systems and was headed by Dr. Olof von
Feilitzen, 32, a librarian whose English is better than that of many
Americans; No. 4, for Russian, headed by Dr. Arne Beurling, 35, a big,
slow-talking, quietly handsome professor of mathematics at Uppsala
University, who in 1952 became a member of the Institute for Advanced
Study at Princeton. Beurling, one of the war's finest crypt-analysts, also
determined the unknown ciphers of other countries and made the initial
breaks. Gylden, as the founder, was a kind of first among equals; he also
annaabi.ee 
