For radar systems as presently understood to detect and track a B-2, an enormous energy supply would be needed to power the search radar.

CENTERFORSECURITYPOLICY: Roundtable Discussion On The B-2 Bomber

In a presentation at the Black Hat and Defcon security conference in July, for instance, French security researcher Andre Costin presented vulnerabilities in the next-generation air traffic control system known as ADS-B that he said would allow a hacker with a software-defined radio to track and even spoof planes in the sky, potentially creating dangerous distractions for pilots.

FORBES: DARPA-Funded Radio HackRF Aims To Be A $300 Wireless Swiss Army Knife For Hackers