Each user can enable it and submit his public key under Settings-> Addon
-> "Secure Mail" Settings.
-Use 'php-gpg' library, a pure PHP implementation of GPG/PGP, released
-under GPL. See [project repo](https://github.com/jasonhinkle/php-gpg).
-
-This plugin could have some problems with keys larger than 2048 ([see issue](https://github.com/jasonhinkle/php-gpg/issues/7))
+Use 'openpgp-php' library, a pure PHP implementation of GPG/PGP.
+See [project repo](https://github.com/singpolyma/openpgp-php).
Need Friendica version > 3.3.2 to work.