Mueller? FBI spying on President again? Signals intelligence operation ran near White House

“The surveillance devices are hard to counteract, though encrypted calling and messaging apps — such as Signal, WhatsApp or Apple’s FaceTime — provide protection against IMSI catchers. Some experts advocate wider deployment of such encrypted communication tools within the U.S. government, along with a move away from traditional cellular calling and texting.”

http://www.chicagotribune.com/news/nationworld/ct-white-house-cellphone-spying-20180601-story.html