The article you posted does not seem to contradict what I said, but rather support it. > The Project X method required courier distribution of noise tracks on

The article you posted does not seem to contradict what I said, but rather support it. > The Project X method required courier distribution of noise tracks on phonograph records. Because the noise had to be as long as the speech it masked and each track could only be used once–it was the audio equivalent of a Vernam cipher or a one-time pad–the system was exceedingly cumbersome.