To install this package, run in Emacs:
M-x package-install RET autocrypt RET
Implementation of Autocrypt (https://autocrypt.org/) for various Emacs MUAs. Run M-x `autocrypt-create-account' to initialise an autocrypt key, and add `autocrypt-mode' to your MUA's hooks (`gnus-mode-hook', `message-mode-hook', ...) to activate it's usage.