{"product_id":"andrew-christopher-codebreaking-and-signals-intelligence-9780367708757","title":"Codebreaking and Signals Intelligence","description":"This book, first published in 1986 and an essential study of signals intelligence, examines Tsarist codebreakers and cryptanalysis during the Weimar Republic; the history of the Government Code and Cypher School; the Ultra programme; hand cyphers and wartime sigint; and surveillance under the Vichy regime.","brand":"Routledge","offers":[{"title":"Default Title","offer_id":53700675109206,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0925\/5829\/5382\/files\/product_image_9780367708757_1_0c508e36-680c-4b3f-ab91-14082fd57b39.jpg?v=1794544760","url":"https:\/\/www.momoxbooks.com\/de\/products\/andrew-christopher-codebreaking-and-signals-intelligence-9780367708757","provider":"momox","version":"1.0","type":"link"}