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Codebreaking : A Practical Guide, Paperback by Dunin, Elonka; Schmeh, Klaus, ISBN 1718502729, ISBN-13 9781718502727, Like New Used, Free shipping in the US "Teaches how to break encrypted texts, whether by hand or using free computer tools. Covers specific cryptographic techniques and includes real-life examples of encrypted text, from modern postcards to nineteenth-century newspaper ads, telegrams, notes smuggled into prisons, and entire encrypted books"--
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.