Many are raising questions about how highly sensitive information is being handled by national security officials. This ...

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

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.

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

Democratic leaders of key House committees are reigniting calling for national security adviser Mike Waltz to step down.

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

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

Defenese Secretary Pete Hegseth, national security adviser Mike Waltz and more of the contacts who appeared in the Signal ...

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

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