What is Signal, the chat app used by US officials to share attack plans? The Citizen 1 year ago Experts agree it is more secure than conventional texting. But it could be hacked. Source: ABC News 6 Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on LinkedIn (Opens in new window) LinkedIn Print (Opens in new window) Print