A magazine journalist's account of being added to a group chat of U.S. national security officials coordinating plans for airstrikes has raised questions about how highly sensitive information is ...

Signal offers end-to-end encryption, disappearing messages, and local backups to protect user data ...

Here's what to know about the messaging app used by Trump Administration officials to discuss military strikes on Yemen.

After messages from Mike Waltz's leaked chat on the Signal app went massively public months ago, he was ousted as President Donald Trump's top national security adviser. Now, he's up for a new ...

Participants on a Signal group chat discussion about a strike on Houthi targets in Yemen are facing a lawsuit over a request to turn over all conversions they had on the encrypted app over the past ...

Mike Waltz, the departing national security adviser at the center of "Signalgate," is seen in new photos using the commercial messaging application during a Cabinet meeting held by President Donald ...