Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Do you really want to delete this prezi?
Neither you, nor the coeditors you shared it with will be able to recover it again.
Make your likes visible on Facebook?
You can change this under Settings & Account at any time.
Cryptology in World War II
Transcript of Cryptology in World War II
Their language was unwritten and very intricate, making it difficult to understand.
Philip Johnston came up with the idea to use the Navajo language to send messages during the war. He spoke the language fluently because he learned it while his dad was a missionary to the Navajos.
Johnston persuaded Major General Clayton B. Vogel to use the Navajo language in the war.
Marines recruited 200 Navajos for the job.
A group of Navajos developed words for common military jargon. NAVAJO CODE 1. Say a list of words in the Navajo language
2. Translate each word to English
3. Take first letter of English word Japanese Encryption
American Decryption PURPLE The Japanese had a machine known as Purple to encrypt messages without the Americans knowing the content.
They also had different codes called Red and Blue which the Americans had decoded. MAGIC It took the Americans 18 months to decipher the messages sent via Purple.
William Friedman, along with the U.S. Army's Signal Intelligence Service and the Navy Yard Machine, decoded Purple using a machine they called MAGIC. Battles with the U.S. Marines 1942-1945: N = tsah (Needle)
A = wol-la-chee (Ant)
V = ah-keh-di-glini (Victor)
Y = tsah-ah-dzoh (Yucca) Guadalcanal
Iwo Jima "Were it not for the Navajos, the Marines would never have taken Iwo Jima." -Major Howard Connor, 5th Marine Div. The Japanese never broke the code! Bibliography Navy & Marine Corps WWII Commemorative Committee. Navajo Code Talkers: World War II Fact Sheet. www.history.navy.mil/faqs/faq61-2.htm (accessed November 30, 2012).
Parker, Frederick D. United States Cryptologic History. www.nsa.gov/about/ _files/cryptologic_heritage/publications/wwii/pearl_harbor_revisited.pdf (accessed December 5, 2012). Example: NAVY