“59372 98324 19043 78903 95320…”. The mechanized female voice drones on and on… What have you stumbled on to? Instructions to spies? Messages exchanged between drug dealers? Deliberate attempts at deception and mis-information?”
A “Numbers Station” is a shortwave radio transmission that transmits random numbers, letters or words over the airwaves. Several nations have used the technique to pass coded messages beginning all the way back in World War 1.
According to the Defense News Blog “Intercepts“, there has been an increase in Chinese based communication using this technique. And it would seem that they prefer to use a mechanical robotic sounding woman’s voice to send their messages.
All the listener needs is a “One Time Pad” to be able to decode the transmission. It’s a very old technique, but seems to still be effective!