The team led by U.S. President Donald Trump's national security adviser, Mike Waltz, set up at least 20 group chats on the ...

WASHINGTON >> The team led by President Donald Trump’s national security adviser, Mike Waltz, set up at least 20 group chats ...

A majority of voters say holding a discussion of plans to attack the Houthis in Yemen on the messaging app Signal was wrong, ...

The national security adviser's use of the messaging app is under scrutiny after he mistakenly added a journalist to a ...

Another sticky spot is that government regulations require a record of communication. Signal—and other secure messaging ...

Signal is the most secure messaging app for your smartphone, but a recent leak from a US government chat group has raised ...

A German news website said it was "particularly easy" to obtain Pentagon chief Pete Hegseth's private contact information.

Trump officials have been slammed for using the app to discuss highly sensitive information, including war plans.

It’s a more extensive use of the app than previously reported and sheds new light on how commonly the Trump administration’s ...

Political fallout is mounting as some Republicans are breaking with the White House on the severity of the leak.

The Atlantic reported that several top administration officials over the course of days discussed war-planning information on ...

A dozen current and former officials confirmed that the encrypted messaging app is used across various agencies — despite ...