Here's what to know about the messaging app used by Trump Administration officials to discuss military strikes on Yemen.

Government watchdogs say it’s a slippery slope for the mayor to continue using the controversial encrypted messaging app.

After messages from Mike Waltz's leaked chat on the Signal app went massively public months ago, he was ousted as President Donald Trump's top national security adviser. Now, he's up for a new ...

The Nevada DMV communicated with ICE over Signal for its work on a federal task force that it says does not relate to ...

As national security services warn that Russian hackers are currently engaged in new global attacks against WhatsApp and Signal users, here’s how to stay safe.

Russian hackers allegedly pose as "Signal support" and try to phish victims. The scheme has already compromised the messages of Dutch government employees.

The Nevada DMV has conceded that its enforcement officers used the Signal messaging service in communications with a federal ...

Add Yahoo as a preferred source to see more of our stories on Google. While testifying at a Senate hearing on his nomination for U.S. ambassador to the United Nations on Tuesday, Waltz was asked about ...

Former national security adviser Mike Waltz, testified before the Senate Foreign Relations Committee in his bid to become U.N. ambassador, stood by the use of Signal in a chat that discussed sensitive ...