But that doesn't mean the enemy can't learn information and be able to predict our next moves in a conflict. Like what we did with the enigma in WWII, we are subject to the same type of listening where someone knows our next move before we make it.
> expose, alter, disable, destroy, steal or gain unauthorized access to or make unauthorized use of an asset
This is the objective of the adversary in a conflict with respect to information and systems security. It doesn't matter if they can control a system, if they can make it less reliable it's still a win (but not as good). If they can get it to feed out false or misleading information to their opponent, it's a win (hacked a radar, can you show an extra blip on the screen or cause them to sometimes shift position and reduce the confidence of the operator?).
When I later also took biology classes (and org. chem., biochem., physiology etc etc) I could not help but see parallels - I say parallels, not transferring the models over! - to how we develop huge systems, be it software, hardware or the combination of both. No single human understands even a significant part of them any more. "Deliberate design" is not the sole force working on those systems any more.