Editing Classical cipher (section)

==References==
{{Reflist}}
* [https://www.ciphermachinesandcryptology.com/en/handciphers.htm Hand Ciphers] Pencil-and-paper ciphers on Ciphermachines & Cryptology
* [http://www.cs.trincoll.edu/~crypto/historical/ Trinity College Department of Computer Science: Historical Cryptography] Information about many different types of encryption algorithms including substitution and transposition ciphers
*[[Singh, Simon]]. [[The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography]]. New York: Anchor, 2000.
*D'Agapeyeff, Alexander. Codes and Ciphers. Oxford UP, 1939.
*[[William Friedman]]. [https://www.nsa.gov/Portals/75/documents/news-features/declassified-documents/friedman-documents/publications/FOLDER_267/41784809082383.pdf  American Army Field Codes In the American Expeditionary Forces During The First World War], U.S. War Department, June 1942
*Laffin, John. Codes and Ciphers: Secret Writing through the Ages. Abelard-Schuman, 1964.
*Wrixon, Fred B. Codes, Ciphers, and Secret Languages. New York: Bonanza Books, 1989.

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