• Genevieve Grotjan, who broke the challenging “Purple” Japanese code with the US Army Signals Intelligence Service.
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    Genevieve Grotjan, who broke the challenging “Purple” Japanese code with the US Army Signals Intelligence Service. Credit: US Government courtesy of the National Cryptologic Museum

  • Genevieve Grotjan, who broke the challenging “Purple” Japanese code with the US Army Signals Intelligence Service.

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<p>US Government courtesy of the National Cryptologic Museum</p>

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