One aspect of the disclosure relates to an out-of-band communication
system and associated process. The out-of-band communication system
includes an encrypted data path that is configured to convey encrypted
data. The out-of-band communication system includes an optical
out-of-band channel that is physically distinct from the encrypted data
path. The encrypted data path extends between an optical transmitter and
an optical receiver. The optical out-of-band channel is configured to
transmit key information from the optical transmitter to the optical
receiver.