Secret Conversations
The innovative Sig Sally system allowed Truman and Churchill to have secure, real-time conversations during WWII, using a unique process that transformed voices into unintelligible noise for anyone listening in. This method ensured that even if intercepted, the Germans would hear nothing but random noise, completely unaware of the critical exchanges taking place. The destruction of the noise records after each call safeguarded the sensitive information, marking a significant advancement in voice communication technology for its time.In this clip
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99% Invisible
Vox Ex Machina
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