A third top Pentagon official was placed on administrative leave Wednesday in the fallout of a major leak of sensitive U.S.

A watchdog group has said the exchanges on the Signal app were federal records, and sued in an effort to preserve them.

A lawsuit over the Trump administration’s infamous Houthi Signal group chat has revealed what steps departments took to ...

Android: Swipe down from the top of your screen -- to access the Quick Settings panel -- and then tap the Airplane mode icon.

Members of President Donald Trump’s administration are putting national security at risk and breaking the law by using an unsecured commercial messaging app called Signal to communicate with each ...

From crypto kingpins to sophisticated scammers, these are the lesser-known hacking groups that should be on your radar.

The incident has raised questions about the Trump administration’s handling of classified information, as well as its use of the encrypted messaging application ... that the Signal issue was ...

WhatsApp uses Signal's encryption protocol, so your chats and calls are just as end-to-end encrypted as those on Signal. But ...

The team led by US President Donald Trump’s national security adviser, Mike Waltz, set up at least 20 group chats on the commercial Signal app to coordinate official work on issues involving ...

Both Signal and Gmail have relatively strong internal security features ... of using publicly available apps, and Republicans were quick to say the issue was being overblown.

The team led by U.S. President Donald Trump's national security adviser, Mike Waltz, set up at least 20 group chats on the commercial Signal app to coordinate official work on issues involving China, ...

Sources say the national security ... messaging app to discuss sensitive issues, Politico reported Wednesday. Waltz and his team have apparently been regularly setting up Signal chats to discuss ...