How about paying reputable security researchers (or testers) to evaluate the software?

Mobile phones manage to transmit back to their towers despite being small, low-power devices. The key: the base station's receivers are very sensitive and the coding schemes used for uplink transmission include more error detection/correction.

Granted, mobile phones don't work over the vast distances used by broadcast radio and television, but they serve as a good example of a low-power, two-way transmission system.