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.

Add Yahoo as a preferred source to see more of our stories on Google. The nation’s top intelligence officials have told lawmakers that it was routine for them to discuss sensitive national security ...

Russian state-backed hackers are attempting to take over WhatsApp and Signal accounts around the world — not by breaking the ...