@section Security
Gnus is able to verify signed messages or decrypt encrypted messages.
-The formats that are supported are PGP and S/MIME, however you need
-some external programs to get things to work:
+The formats that are supported are PGP (plain text, RFC 1991 format),
+PGP/MIME (RFC 2015/3156) and S/MIME, however you need some external
+programs to get things to work:
@enumerate
@item
@lisp
(require 'gpg)
(setq mml2015-use 'gpg)
+(setq mml1991-use 'gpg)
(setq gpg-temp-directory (expand-file-name "~/.gnupg/tmp"))
@end lisp
To sign or encrypt your message you may choose to use the MML Security
menu or @kbd{C-c C-m s p} to sign your message using PGP/MIME,
-@kbd{C-c C-m s s} to sign your message using S/MIME. There's also
+@kbd{C-c C-m s s} to sign your message using S/MIME. There's also
@kbd{C-c C-m c p} to encrypt your message with PGP/MIME and @kbd{C-c
C-m c s} to encrypt using S/MIME. @xref{Security, ,Security, message,
The Message Manual}.