Cryptography: the Science of Secret Writing

Soft cover. Condition: Very Good. Some rubbing wear on front cover and spine. Mark on back cover. Text clean with no tears, marks, or creases. This dover edition, first published in 1955, is an unabridged replication of the 1943 first edition with corrections. History and modern use of codes and ciphers, together with 151 problems and their solutions. Contents include: I. Secret Weapon No. One; II. The History of Secret Writing; III. Transposition Ciphers; IV. Substitution Ciphers; V. Codes Compared with Ciphers; VI. Cryptanalysis; VII. Problems; and VIII. Solutions.