Category Archives: Room 40

Hall’s Choice

Admiral Hall of Room 40 – Britain’s analog to the American Black Chamber – was faced with an impossible choice during World War I: immediately release information of the Zimmermann Note to the Americans and risk the Germans developing new, more secure ciphers, or holding on to the note until the perfect moment, potentially risking […] Continue reading

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All is Fair in Love and War

In The Code Book, Simon Singh details the codebreaking successes of the British military during World War I–successes that often needed to be kept secret and prevented the spread of some important, yet sensitive information during the war. One such piece of critical information was the Zimmerman telegram. While some may think it completely unethical […] Continue reading

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