Actually that’s not true. Examples of the codes would allow for cyphers to be built that could be used to interrupt any nuclear response that the US made.
Let’s say there was a reason to use Nukes. A cypher code could be used to confuse the response, and basically leave America unable to respond. It would be a gamble but it would also be enough to wipe us off the map as nukes aren’t sent because they received a fake but realistic code.
Flipside we could get into mutual self destruction being worse than one side losing, but **** I don’t want to be nuked.
Doesn't work like that. Closed system Fam.
It would take multiple points of failure at multiple levels in multiple places to even come close to "confusing the response", even with an inside actor.
The issue is technological advantage, the arms race never stopped.