The recent national security breach involving a Signal group chat has raised concerns regarding the messaging app’s security.

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

Learn more about Signal, including whether the news about its use in a military intelligence breach impacts its effectiveness ...

Secure messaging app Signal has been in the spotlight this week for national-security reasons, but companies can also learn lessons from the Trump administration’s misstep.

In the aftermath of the Trump administration's military attack plans scandal, many are left wondering why sensitive national ...

Top Trump administration national security officials’ use of the messaging app Signal is raising new questions about the platform and how the administration is transmitting sensitive ...

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

Mistake.” “Glitch.” “Entirely permissible.” “Hoax.” See the varied and shifting responses President Donald Trump and his ...

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

Four sources tell Politico they were aware of at least 20 chat groups, all four confirmed sensitive information was discussed ...

The people say Loomer made her case for the firings in an Oval Office meeting attended by Trump and other top officials.