High Security? I suppose it depends on context. But for real high security facilities, a visitor is not getting past the first guard desk without an ID check wi

High Security? I suppose it depends on context. But for real high security facilities, a visitor is not getting past the first guard desk without an ID check with the visitor's name being on a list that is maintained via secure communication channels - facility to facility. And there are often multiple levels of guard stations to pass through where this is repeated.