{"product_id":"9780486200972","title":"Cryptanalysis by Helen Fouche Gaines","description":"Thorough, systematic introduction to serious cryptography, especially strong in modern forms of cipher solution used by experts. Nihilist, grille, U. S. Army, key-phrase, multiple-alphabet, Gronsfeld, Porta, Beaufort, periodic ciphers, and more. Simple and advanced methods. 166 specimens to solve - with solutions.\u003cbr\u003eBinding: Paperback \/ softback","brand":"Gardners","offers":[{"title":"Default Title","offer_id":56290588426613,"sku":"9780486200972","price":13.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/7193\/3106\/files\/9780486200972.jpg?v=1762733666","url":"https:\/\/backstory.london\/products\/9780486200972","provider":"Backstory","version":"1.0","type":"link"}