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

Last Wednesday, former national security advisor Mike Waltz was photographed at a cabinet meeting using TeleMessage, a modified version of Signal, the encrypted messaging app that has been the source ...

Mike Waltz appears to be communicating with other Trump officials via a version of Signal a day before he was removed as White House national security advisor. A photo from a Cabinet meeting Wednesday ...

'Signalgate' continues to rumble on, with even more of the Signal messages that were shared between Trump officials – and, inadvertently, The Atlantic – revealed today. But how exactly did this group ...

Democrats stretching back nearly a decade have touted the use of the encrypted messaging app Signal, long before the Trump administration came under the national spotlight for using the app to discuss ...

A popular messaging app called Signal was recently the preferred communications platform for top officials in the Trump administration to discuss secret war plans. But the use of the app, widely ...

The Trump administration struggled Wednesday to stem the fallout from revelations that top national security officials discussed sensitive attack plans over a messaging app and mistakenly added a ...

Signal and WhatsApp are both end-to-end encrypted messaging apps, but they differ in ownership and data collection practices. WhatsApp, owned by Meta, collects metadata on users, while Signal, a ...

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 ...