A photo taken this week showed Mike Waltz using an app that looks like—but is not—Signal to communicate with top officials.

The latest controversy comes as both Waltz and current Defense Secretary Pete Hegseth have made headlines for multiple Signal ...

The chat, in which Defense Secretary Pete Hegseth laid out plans for an upcoming military strike in Yemen, inadvertently ...

President Trump recently discouraged the use of the Signal app after controversy over a group chat of administration ...

RONALD J. DEIBERT is Professor of Political Science and Director of the Citizen Lab at the University of Toronto Munk School ...

Encrypted workplace communications services have seen a spike in user interest in the weeks since the now-infamous ...

“Today, though, everyone uses the same computers, the same software, and the same networks ... analysts have raised other concerns about “Signalgate.” One of the biggest risks is where ...

Former national security adviser Mike Waltz was photographed using a Signal-like messaging app during Wednesday’s Cabinet ...

Signal's use by Australian officials raises concerns about transparency, record-keeping, and government accountability.

The reports come after controversy over a Signal chat Waltz created in March to discuss plans for a military strike on Yemen, ...

"Today, though, everyone uses the same computers, the same software, and the same networks ... analysts have raised other concerns about 'Signalgate.' One of the biggest risks is where the ...

President Donald Trump has made clear that ending congestion pricing is one of his policy priorities. When Transportation ...