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

The news of Trump officials using Signal for a group chat on military operations has raised many questions about just how secure such messaging apps are and the risks if government officials use them ...

DOGE staff are reportedly using Signal to communicate. The revelation follows the news that national security leaders used Signal to discuss war plans. DOGE has increasingly come under fire for a lack ...

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 ...

The messaging app Signal is making headlines again, with the news that U.S. Defense Secretary Pete Hegseth used it for a chat with his wife, his personal lawyer and others in which he shared sensitive ...

The nation’s top intelligence officials have told lawmakers that it was routine for them to discuss sensitive national security issues on the encrypted messaging app Signal. It’s widely used at their ...

Why is Christian Science in our name? Our name is about honesty. The Monitor is owned by The First Church of Christ, Scientist, and we’ve always been transparent about that. The church publishes the ...

On ThursdaY, Reuters published a photo depicting then-United States national security adviser Mike Waltz checking his phone during a cabinet meeting held by President Trump in the White House. If you ...

A photo taken by Reuters' Evelyn Hockstein during a Cabinet meeting Wednesday shows Waltz holding his phone below the table, with the encrypted-texting app open and visible. It also shows Waltz in ...

Former White House national security adviser Mike Waltz was seen using the encrypted messaging app Signal in photos taken during Wednesday's Cabinet meeting. Waltz was removed as national security ...

The chat app, which is run by a nonprofit foundation, has been downloaded 220 million times. Here's what to know about Signal, including who owns it and whether it's safe to use. The messaging app ...