True, but inertia and backwards compatibility is hell of an opponent. IPv6 turned 10 years old recently and we are still far away from universal deployment. TLS

True, but inertia and backwards compatibility is hell of an opponent. IPv6 turned 10 years old recently and we are still far away from universal deployment. TLS 1.2 only got more traction once BEAST - a proof of concept for a paper that was published years earlier - made some waves. And with PGP you have the additional problem that there is no standard way to find out which changes to the bases protocol the client of the recipient supports. If we could ignore inertia and backwards compatibility we could collectively switch to some TextSecure style messaging over Tor with key distribution via DANE for universal end to end encryption with meta data protection. Alas, that is not how our world works…