One-Time Pad (Silk)

Circa 1930-1940, SOE

One-time pads were intended for one use only. Sender and recipient held identical pads. Each sheet was used for one message and then destroyed – an unbreakable system.

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Additional Objects

Secret Cipher Ashtray

Circa 1930-1940

Shoe with Heel Transmitter

1960s-1970s

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