Back in October 1944, Koenig had suggested a theoretical way of securing a telephone call by having the recipient of a call add noise to the signal and then sub

Back in October 1944, Koenig had suggested a theoretical way of securing a telephone call by having the recipient of a call add noise to the signal and then subtract it afterward. Only Bob could subtract the noise, because only he knew what he had added in the first place. An eavesdropper, Eve, simply would not know how to modify the noise, because she wouldn’t have access to the noise that had been added to the phone conversation in the first place. Since that's not terribly clear, here's the explanation: https://techpinions.com/an-old-mystery-solved-project-c-43-and-public-key-encryption/18205 https://techpinions.com/an-old-mystery-solved-project-c-43-a...