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 ...

Last week, a Reuters photo showed Waltz using TeleMessage with chats labeled "J.D. Vance" and "Gabbard." The hack reignites concerns about the security of Waltz's messages. Information the hacker ...

A federal judge said Friday it’s too late to order the recovery of already-deleted Signal messages from key members of ...