  A covert communication system is developed that modulates Morse code
characteristics and that delivers its mes- sage economically and to
geographically remote areas using radio and EchoLink. Our system allows a
covert message to be sent to a receiving individual by hiding it in an existing
carrier Morse code message. The carrier need not be sent directly to the
receiving person, though the receiver must have access to the signal.
Illustratively, we propose that our system may be used as an alternative means
of implementing numbers stations.
