Codici cifrati: Arne Beurling e la crittografia nella II guerra mondiale = Cipher codes : Arne Beurling and cryptography in world war II

The story of the German codebreaking is told in detail for the first time and has all the makings of a thriller, but with elements that make it an excellent introduction to the field of cryptography, as well as a vibrant and human portrait of the society of the time: a desperate wartime situation, political and espionage intrigue, the sometimes incomprehensible yet always fascinating genius of the main architect of its success — mathematician Arne Beurling—the difficulties and tricks of the trade, but also the systematic and obscure work of a crowd of codebreakers who treat their situation as if it were a normal job. The author, Bengt Beckman, was for years, after the war, head of the cryptanalysis department of the Swedish intelligence agency.