it's not like you can't implement encrypted comms over mail and phone in the first place. people with a strong enough incentive (and nerds) have been using symmetric encryption for a long time.
what has changed is, like you say, how trivially easy it is to send instant encrypted messages. what was once the domain of spy agencies and organized crime is now practical for my mom to ask me what I would like for dinner. one wonders why the FBI finds that so concerning.
what has changed is, like you say, how trivially easy it is to send instant encrypted messages. what was once the domain of spy agencies and organized crime is now practical for my mom to ask me what I would like for dinner. one wonders why the FBI finds that so concerning.