Cryptography is a machine that protects information by transporting messages/codes into a language only you and your partner can understand. It also decode messages. It was used in WWII to send messages across. The Germans used the Enigma to code their messages during WWII. The United States used Navajo to code their messages. The U.S found out how to break the enigmas codes by using the SIGIBA code. The Navajo code talkers were men who translated the cryptography messages. The Navajo Indians were the only ones who knew the  Navajo language, so they helped the U.S, by translating the codes. America and Briton were allies so they had a link so that Germany couldn’t understand the messages.