Comment by stmw
6 hours ago
OP here, yes, good write up, although I wish someone would code up a simulation that showed it and allowed us to hear what this telephone sounded like to FDR and Churchill.
6 hours ago
OP here, yes, good write up, although I wish someone would code up a simulation that showed it and allowed us to hear what this telephone sounded like to FDR and Churchill.
Supposedly like this: https://www.youtube.com/watch?v=OvR4qK0B--w&t=517s
(I see now that it was already linked elsewhere in the the thread.)
Pretty impressive for cross atlantic one-time pad voice comms in an analogue era, I think. It's amazing what money and smart people can accomplish.
Also found this fantastic page: https://www.cryptomuseum.com/crypto/usa/sigsaly/