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

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

Senior Trump administration officials used Signal, an encrypted messaging app, for military discussions and accidentally included a journalist, exposi ...

In some cases, federal agencies have permitted the use of Signal, the encrypted messaging app used by top Trump officials to ...

US president defends key security official after journalist says he was added to group chat about air strikes.

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

The Pentagon has issued a stark warning against the use of the encrypted messaging app Signal, raising concerns over cybersecurity lapses at the highest levels of government. This advisory comes in ...

Last week’s revelation that Trump administration officials used the commercial messaging app Signal to discuss top secret ...

The nation’s top intelligence officials have told lawmakers that it was routine for them to discuss sensitive national security issues on the encrypted messaging app Signal. It’s widely used ...

Along with the political problems of “Signalgate,” there are other more serious issues confronting the U.S. government. That’s particularly true for the NSA, according to Bruce ...

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