Eradictor
this device was developed by the Jedi Knights of the Old Republic. Resembling a large communications dish, the eradictor could lock onto the communications of a Jedi working from a remote location and scramble the incoming transmission's header data. This way, the origination point of the message was unreadable to any being who tried to slice the transmission in order to pinpoint a Jedi's location. The exterior walls of the Jedi Temple on Coruscant were dotted with eradictors.