> it's amazing how easy end-to-end encryption on Signal and Whatsapp is They both use a centralized, authority for identification and key sharing, sidestepping

> it's amazing how easy end-to-end encryption on Signal and Whatsapp is They both use a centralized, authority for identification and key sharing, sidestepping the hardest part entirely. Also, they are their own protocol and as such you don't suffer the encrypted/plain-text-only email dichotomy, sidestepping another pain point. When you don't care about the decentralized nature of email and can force everything to be encrypted, then the problem becomes much easier.