IG-88 Hacking 2

As  he  arrowed  toward  his  destination,  the  automated  defenses  of  Cloud City sent  out a  query, taking  care of  the initial  inspection  before  alerting  any   human  guards  to  the  assassin droid's approach.

IG-88  transmitted  command  codes  and  a  breakdown  in   programming,  squelching  the  normal   routines  of  Cloud City's defense network. As a result, the alarm  sensors left him alone, and the human observers in  Kerros Tower did not see even a blip on their traffic grid.