National security officials are using commercial apps over secure communications systems that feel burdensome. New apps offer ...

The ability to navigate power dynamics in the White House and sort through competing policy visions is essential.

The clone, TeleMessage, was the subject of a reported hack in which the contents of some direct messages and group chats were ...

When the world discovered that Trump administration officials were discussing highly classified information over Signal, it ...

The TM SGNL app, a modified version of Signal used by Trump officials, has been hacked, potentially due to hardcoded ...

President Donald Trump’s removal of national security adviser Mike Waltz brings further disruption to a national security ...

RONALD J. DEIBERT is Professor of Political Science and Director of the Citizen Lab at the University of Toronto Munk School ...

Rep. Adam Smith (D-Wash.) said Mike Waltz’s Senate confirmation hearing for the U.S. ambassador to the United Nations role ...

Donald Trump’s National Security Adviser Mike Waltz will be leaving his role in the White House, multiple outlets have ...

The phone number used in the Signal chat could also be found in a variety of places, including on social media and a fantasy ...