Military radio transmissions are encrypted using hardware-loaded pre-shared keys that never go over a network and are stored in guarded arms rooms behind many f

Military radio transmissions are encrypted using hardware-loaded pre-shared keys that never go over a network and are stored in guarded arms rooms behind many fences and thick concrete walls on military installations. Keys are rotated at least daily, often twice daily. Granting that I guess I wouldn't know if China actually managed to break US military encryption, but as far as I do know, our encryption never has been broken. "Classified" information would effectively be useless if so, since we have no choice but to still use the same backbone fiber lines as everyone else to get internetworking working (or radio, which is totally wide open no matter what), and end to end encryption is the only assurance we have that this information is not being intercepted.