"Whatever measures you put in place to deter intruders. Most people concerned about such things take precautions on their own to make sure their door stays securely closed when they're not using it. It hasn't been a problem this time I've been here, but the last time I was in the Nexus years ago there were several breaches in both directions that lead to some very dire circumstances."

He gives the newcomer in the sunglasses a polite nod as he's refilling the man's cup of coffee, before his gaze slides back to Jack.

"There are no guarantees, in the Nexus."