>whose private key is provided to the user Just like the private keys in our SIM card, eh? https://firstlook.org/theintercept/2015/02/19/great-sim-heist/ https

>whose private key is provided to the user Just like the private keys in our SIM card, eh? https://firstlook.org/theintercept/2015/02/19/great-sim-heist/ https://firstlook.org/theintercept/2015/02/19/great-sim-heis... That plan doesn't remove the threat, it just moves it: to the privacy of the private key.