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THE MILITARY CIPHER OF COMMANDANT BAZERIES AN ESSAY IN DECRYPTING

1938réf. GD012958BC2S2Cardanus Press 1938. Cardanus Press 1938 First Edition 8vo 137 pp blue cloth boards with title and author gilt to spine no dust jacket. Manuscript chart envelope affixed with glue to back pastedown. Envelope contains three printed cardstock decryption keys. It appears envelope has never been open. Presentation copy signed and dated by author on front endpage. Very good condition. An unusual explanation and examination of cryptography by New York architect Rosario Candela utilizing the supposedly unbreakable ciphers of French Commandant Bazieres. A historical researcher as well as a military officer Bazeries was the author of the highly influential codebreaking book Les Chiffres Secrets Devoiles the first known person to break the "Grand Chiffre de 1691" code utilized by King Louis XIV and a critic of historical and current French encoding methods. In 1898 Bazeries proposed the French military adopt his unique method of creating ciphers using only pencil paper and a keyword offering them some test examples. Furious that the government rejected his code for lack of security despite being unable to solve it themselves Bazeries published his proposed method and a group of four ciphers the last of which was unsolved until this English language translation and criticism from Rosario Candela. Candela a Sicilian immigrant taught himself cryptography out of a mixture of boredom curiosity and the stagnation of the Great Depression. Self-taught from a variety of French and Italian books he imported from Europe Candela was a skilled code breaker and manages to provide a thorough overview and analysis of the strengths and weaknesses of Bazeries system. Rosario Candela was so successful in his efforts that he began to teach a class on cryptography at Hunter College in 1941 the first public course of its type in the United States and was later tasked with assisting the Office of Strategic Services OSS in World War II.This copy includes three pages of handwritten cryptography work notes including a full page demonstrating the Russian cipher system used on the Eastern Front in WWI apparently borrowed from Contributions of the Cryptographic Bureaus In The World War by Swedish cryptographer Yves Gylden translated and printed in English in the Navy Signal Corps Bulletin in 1935. Very scarce edition especially signed by author. . Signed by Author. First Edition. Hard Cover. Very Good/No Jacket. 8vo - over 7¾" - 9¾" tall. Cardanus Press Hardcover

Cape Cod Booksellers · États-Unis395,00 $US≈ 352,90 €

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