Democratic leaders of key House committees are reigniting calling for National Security Advisor Mike Waltz to step down.

The Trump administration sought to put the scandal over its use of the Signal messaging app behind it on Monday, calling it ...

The White House is defending use of the app, but other government officials and security experts have been highly critical.

Last week, the White House said the National Security Council, the White House counsel office and President Trump adviser ...

This is Matthew Rosenfeld aka Moxie Marlinspike. He invented Signal. For those who don't know, Signal is a private messaging ...

Trump administration officials are struggling to stem the fallout from revelations that top national security officials ...

Downloads of the app surged in the past week after the Atlantic published White House officials’ texts about a military ...

The White House doubled down Wednesday on its insistence that its top national security officials did nothing wrong when they ...

But Signal isn't the only messaging app that uses end-to-end encryption, and end-to-end encryption isn't the only consideration in choosing a secure messaging app. In addition, secure messaging ...

White House press secretary Karoline Leavitt said Monday that national security adviser Mike Waltz continues to have President Donald Trump’s confidence and that it was done discussing the ...

The Signal group chat included several top Trump administration officials as well as a journalist. Here's what to know about ...

After The Atlantic’s editor-in-chief, Jeffrey Goldberg, was mistakenly added to a Signal group chat involving top White House officials, it begs the question: Which messaging apps are most secure?