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 60s, asked for help. He couldn’t figure out how to enable airplane mode on his aging Android phone.
https://arstechnica.com/?p=1654057
origin - https://www.pipiscrew.com/2020/02/signal-is-finally-bringing-its-secure-messaging-to-the-masses/ signal-is-finally-bringing-its-secure-messaging-to-the-masses