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US Navy Special Group OP-20-G signals intelligence intercepted radio messages and decoded Japanse plans to attack and were suprised by the American Naval Task Force sent to fight them.
The US Naval Communications Service OP-20-02 Station "HYPO" signals intelligence unit in Honolulu, Hawaii intercepted and decoded Japanese JN-25 radio messages of their pending military plans.
A superior intelligence network that intercepted, decoded and translated Naval messages which allowed the US Fleet to spring a surprse attack.
it was the Comanche tribe who were used to use their native languages for transmitting and receiving messages during WWII.
You are probably thinking of the "Enigma" cipher machine. It was electro-mechanical device used to convert messages in to & out of codes. There were many different codes, and several versions of the Enigma machine. Not all German codes used the Enigma, however it is the most famous one discussed now.
association
37signals (Company named after the number of messages indicating signs of extra-terrestrial intelligence in the TV show Nova
Association
US Navy Special Group OP-20-G signals intelligence intercepted radio messages and decoded Japanse plans to attack and were suprised by the American Task Force
The venona project was a secret collaboration of the U.S and the U.K intelligence agencies involving cryptanalis of messages sent by the intelligence agencies of the the Soviet Union, mostly during world war II.
US Navy Special Group OP-20-G signals intelligence intercepted radio messages and decoded Japanse plans to attack and were suprised by the American Naval Task Force sent to fight them.
Yes, Prudence Wright was a spy during the American Revolutionary War. She gathered intelligence, passed messages, and helped organize an espionage network in Massachusetts. She played a significant role in supporting the Patriot cause.
You could be talking about the Navajo Indians or British Intelligence / Bletchley Park.
Project Verona was an U.S counter intelligence effort to try to decrypt Soviet messages. The project lasted from 1943 until 1980.
Invisible ink messages could be used to evade detection.
The US Naval Communications Service OP-20-02 Station "HYPO" signals intelligence unit in Honolulu, Hawaii intercepted and decoded Japanese JN-25 radio messages of their pending military plans.
A superior intelligence network that intercepted, decoded and translated Naval messages which allowed the US Fleet to spring a surprse attack.