令和義塾🛡中高生・高卒生・教員・留学志望者のための学習塾

仕事をしている人が意識する方が良いことや、我が国の在り方の改善策について述べるかも🐈

A Code-Breaking Dutch in Paris🐱

 Auguste Kerckhoffs wrote his treatise 'La Cryptographie militaire'. Although Kerckhoffs was Dutch, he spent most of his life in France, and his writings provided the French with an exceptional guide to the principles of cryptanalysis. By the time the First World War had begun, three decades later, the Franch military had implemented Kerckhoffs' ideas on an industrial scale. While lone geniuses like Painvin sought to break new ciphers, teams of experts, each with specially developed skills for tackling a particular cipher, concentrated on the day-to-day decipherments. Time was of the essence, and conveyor-belt cryptanalysis could provide intelligence quickly and efficiently.