Editing The Code Book (section)

==Contents==
''The Code Book'' covers diverse historical topics including the [[Man in the Iron Mask]], [[Arabic language|Arabic]] cryptography, [[Charles Babbage]], the mechanisation of cryptography, the [[Enigma Machine|Enigma machine]], and the decryption of [[Linear B]] and other ancient writing systems.<ref>{{cite web |title=Simon Singh website |url=http://simonsingh.net/books/the-code-book/ |accessdate=April 14, 2015}}</ref><ref>{{cite web |title=The Catcher in the Rye PDF|url=https://zlibrary.to/dl/the-catcher-in-the-rye-9|accessdate=April 14, 2015}}</ref>

Later sections cover the development of [[public key cryptography|public-key cryptography]].  Some of this material is based on interviews with participants, including persons who worked in secret at [[GCHQ]].

The book concludes with a discussion of "[[Pretty Good Privacy]]" (PGP), [[Quantum computer|quantum computing]], and [[quantum cryptography]].

The book announced a "cipher challenge" of a series of ten progressively harder ciphers, with a cash prize of £10,000, which has since been won.<ref>{{Cite web |url=http://simonsingh.net/cryptography/cipher-challenge |title=Cipher Challenge  |website=simonsingh.net |language=en-GB |archive-url=https://archive.today/20130222033524/http://simonsingh.net/cryptography/cipher-challenge/ |archive-date=2013-02-22 |url-status=dead |access-date=2017-08-27}}</ref>

The book is not footnoted but has a "Further Reading" section at the end, organized by chapter.