The letter detailed a trial program that used a series of cellular network sensors to discover the use of International Mobile Subscriber Identity (IMSI) catchers, Ars Technica reported. It was not clear who was operating the StingRay devices, but DHS was concerned that foreign adversaries might be involved, the report said. Krebs was nominated to assume a permanent role as undersecretary, but Wyden had opposed moving forward with his nomination, demanding more details on the IMSI catchers. “This admission from DHS bolsters my concern about stingrays and other spying devices being used to spy on Americans’ phones,” Wyden said Thursday in a statement. "Given the reports of rogue spying devices being identified near the White House and other government facilities, I fear that foreign intelligence services could target the president and other senior officials."

Source: Fox News June 02, 2018 05:37 UTC