Several days after top national security officials accidentally included a reporter in a Signal chat about bombing Houthi sites in Yemen, a Pentagon-wide advisory warned against using the messaging ...

Former national security adviser Mike Waltz was photographed using a Signal-like messaging app during Wednesday’s Cabinet meeting, more than a month after he first came under intense scrutiny for ...

Earlier this week, The Atlantic‘s editor-in-chief Jeffrey Goldberg revealed in a startling piece that he’d accidentally been added to a group chat on Signal between key national leadership including ...

A Pentagon-wide advisory went out one week ago warning against using the messaging app Signal, even for unclassified information. "A vulnerability has been identified in the Signal messenger ...

A screengrab of a page from a Pentagon-wide memo warning against using the messaging app Signal. Several days after top national security officials accidentally included a reporter in a Signal chat ...