Science Friday Science Friday

The Black women codebreakers of the Cold War

Jul 27, 2026 · 12m

Summary

Dr. Sarah Valentine discusses her book "Decoding the Devil," revealing the overlooked history of Black women codebreakers who deciphered Soviet nuclear intelligence during the Cold War. These women performed manual data analysis, acting as early "human computers" before training the first language-processing machines. Despite their critical contributions, they faced segregation and were largely excluded from subsequent opportunities in the emerging field of computing.

Topics discussed

Sponsors and introductory announcements Introduction to Black women code breakers in the Cold War Dr. Valentine's discovery of the Invisible Cryptologists The segregated Traffic Processing Division and manual data analysis Recruitment, federal jobs, and educational barriers Profile of Iris Carr and her career progression Women as human computers and the Soap Flakes project Automation replacing human labor and missed opportunities Research challenges and finding Eleanor Roosevelt's note Translation as code breaking and closing remarks
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