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 ...

In the world of Facebook, Instagram and other social media platforms, we typically find someone by their username. On messenger apps, however, we still largely find and save a new contact with a ...

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 ...