Carrier pigeon, World War II, cipher
From MysteryWiki
References
- Furness, Hannah. "D-Day Pigeon Code Mystery: Our Readers' Solutions." The Telegraph. Telegraph Media Group Limited, 7 Dec. 2012. Web. 31 Dec. 2015.
- Johnson, Andrew. "Expert Dismisses Claims WWII Pigeon Code Has Been Cracked." The Independent. Independent Digital News and Media Ltd., 26 Dec. 2012. Web. 31 Dec. 2015.
- Johnston, Ian. "Experts: Unbreakable Code Message Found on WWII Carrier Pigeon." NBC News. NBC News Digital, 23 Nov. 2012. Web. 31 Dec. 2015.