rejewski marian (1 Ergebnisse)

Hardcover. Zustand: New. 8vo (24 cm), text in English and Polish bound dos-à-dos, 160 pp; 162 pp, 8 plates with illustrations. Second revised edition of Rejewski's memoirs, drawn from two typed manuscripts deposited by the author in the Military History Institute: the Memories written in 1967, and a Supplement written in 1974. Marian Rejewski (1905-1980) was the principal figure in a team of Polish mathematicians, including Jerzy Ró?ycki and Henryk Zygalski, who broke the German Enigma cipher using purely mathematical methods while working for the Polish Armed Forces General Staff Cipher Bureau. Their methods were subsequently shared with French and British allies before the outbreak of World War II. The main memoir proceeds chronologically through Rejewski's cryptological career, opening with his early work at the branch office in Pozna? before his move to the General Staff in Warsaw. The technical heart of the work comprises detailed accounts of the Enigma machine itself -- recovering message keys, the machine's mechanical description, permutation theory, reconstructing rotor connections, and recovering daily keys. Subsequent chapters trace the operational deployment of Enigma intelligence, both in Poland and in the West, followed by accounts of clandestine work in France and, finally, work in Great Britain. The Supplement, written seven years later, revisits each chapter with additional material and corrections, and includes a roster of Z Team members -- the codebreaking unit with which Rejewski served. The volume is further enriched with photographs and facsimiles of key documents, mathematical notes prepared by Prof. Jerzy Kaczorowski providing concise exposition of the relevant mathematical and cryptological concepts, historical notes by Dr Marek Grajek supplying contextual background, a biographical outline of Rejewski, an itinerary following his wartime route, an index of names, and a list of documents.