A system and method for maintaining privacy in transmission of a high bandwidth
analog signal. A preferred system and method breaks an input signal into bands
and then uses Walsh codes to overlay many signals on top of each other with a set
of phase modulators to establish scrambling of the input signal. The scrambled
signal is then transmitted. The received scrambled signal has the phase modulation
removed and an inverse Walsh transform recovers the original bands. The recovered
bands are added together to recover the original signal. The system and method
use techniques that establish synchronization and phase coherency complete the process.