In some cases, federal agencies have permitted the use of Signal, the encrypted messaging app used by top Trump officials to ...

The White House’s assertion that the case is closed surrounding national security officials’ use of Signal is getting pushback in Congress, even among some Republicans who say their own probes ...

The move comes soon after far-right activist Laura Loomer urged Trump to purge staffers she deemed insufficiently committed ...

President Donald Trump said Thursday that he's fired "some" White House National Security Council officials, a move that ...

WASHINGTON-The team led by US President Donald Trump’s National Security Adviser Mike Waltz set up at least 20 group chats on the commercial Signal app to coordinate official work on issues ...

Signal's encryption protocol is open source ... should check for a classified message sent through other means. Beyond concerns about security, Signal and other similar apps may allow users ...

She referred to reports Thursday that the Pentagon’s inspector general will launch his own internal review, and she repeated denials by top officials that the material at issue was classified.