The Pentagon’s latest report makes one thing clear: Signal protects conversations, but it was never designed to safeguard U.S. war plans — and using it that way carried real risk for American forces.  This is a deeper look at the app at the center of the Pentagon’s “Signalgate” investigation and what the watchdog says went wrong. What Signal Actually Does Signal is one of the world’s most widely used encrypted messaging apps, favored by journalists, activists, aid workers, and privacy-conscious