I worked with a asian guy who was a system admin who left to work for Sony here in the Los Angeles area.... hmmm
Never did ask him if supported the south or the north : )
I've been granted the keys to many Kingdoms. I'm safe.
I worked with national laboratories. If there were visits by foreign nationals we had to double up escorting them around.
It will take concentric rings of access, where the center ring is the most trusted and verifies the honesty of the next outside ring.
Many large companies are not sophisticated to implement this.