kengr

You don't need people on the Moon... what you'd need is a repeater station, and a very tight beam uplink from someplace out in international waters, or rather several somewheres. Or if you really don't want people knowing where you're transmitting from, then use a laser uplink to the Lunar transmitter array from some orbital satellites and tight beam microwave link from multiple ground stations. It wouldn't look unusual for a encrypted uplink to a satellite, and the laser relay link wouldn't even be visible from Earth.

Come to think of it... you wouldn't even need that big of a satellite, a 20x20x30 cube-sat would do it as the orbital relay. How you'd get the radio transmitter array on the moon I'm not sure, but given that Space-X is planning on doing ride-shares on their moon shots for private firms, it's not beyond the bounds of possibility.