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

A new warning from Dutch intelligence agencies says Russian-backed hackers are targeting private messaging apps used by ...

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.

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 ...

Hackers from the Kremlin have mounted a “large-scale global cyber campaign” targeting civil servants, military personnel and other notable figures via messaging applications WhatsApp and Signal, Dutch ...

WASHINGTON, D.C. – The Pentagon's internal watchdog has concluded a monthslong review of Secretary of Defense Pete Hegseth's improper use of the Signal app to discuss sensitive military operations.

WASHINGTON — The Pentagon’s watchdog found that Defense Secretary Pete Hegseth put U.S. personnel and their mission at risk when he used the Signal messaging app to convey sensitive information about ...

Dutch intelligence agencies warned of a global cyber campaign by Russian-backed hackers targeting Signal and WhatsApp accounts of officials and journalists. Hackers are using phishing techniques to ...

The Nevada DMV is acknowledging the use of the encrypted messaging app Signal in a new court filing.