Encyclopedia : H : HC : HC9 (2 articles)

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HC-9
An HC-9 on display at Bletchley Park. The HC-9 was a mechanical cipher device manufactured by Swedish company AB Transvertex. The HC-9 was designed after World War II and likely remained in use up to the 1970s. The machine was used for low-level communications. Operation The HC-9 made use of ..

 

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