The communication app Signal has been in the news after Atlantic’s editor-in-chief reported that he was privy to a top-secret conversation involving Defense Secretary Pete Hegseth and Vice President JD Vance, among other important leaders. But what is Signal, and is it private? Signal is a secure messaging app with end-to-end encryption. The app also has a disappearing messages function and features like photo blurring. However, even with these settings in place, users must be careful when adding new members to private chats, and mobile devices can also be compromised by spyware. (Life Hacker)