The encrypted-communication app Signal has a sterling reputation within the security and crypto community, but its critics point to a nagging flaw: The app asks for access to your phone's contact list ...

You can pin chats on Signal so that your frequently visited conversations remain at the top of the screen for easy access.

Last month, the cryptographer and coder known as Moxie Marlinspike was getting settled on an airplane when his seatmate, a Midwestern-looking man in his sixties, asked for help. He couldn't figure out ...

Instead, you need to open and register Signal on the new phone and select an iOS transfer. Then you use a QR code to connect the old and new iPhones and a transfer will begin. Be warned — that ...