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 ...

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 ...

The developer of secure messaging app Signal is working on an advanced new technique to fully encrypt and anonymize the process of contact discovery (matching a user's phone contacts with existing ...