[hellbanner]

"due to unspecified security features that prevent the doors from being opened except in "an approved security area""

I wonder what that means, public + private key checks in the door?

[M_Grey]

You have to assume that such a truck is constantly "phoning home" and hopefully has some kind of asset tasked to watch it constantly. Maybe the process to get in involves authorization from "home base" in the form of that private key?