+request to do a combined sign and encrypt. This currently is
+confirmed to work with GnuPG, but might not work with PGP or PGP5.
+
+If optional @var{passphrase} is @code{nil}, the passphrase will be
+obtained from the passphrase cache or user.
+@end deffn
+
+@deffn Command pgg-encrypt-symmetric-region &optional start end passphrase
+Encrypt the current region between @var{start} and @var{end} using a
+symmetric cipher. After invocation you are asked for a passphrase.
+
+If optional @var{passphrase} is @code{nil}, the passphrase will be
+obtained from the passphrase cache or user.
+
+symmetric-cipher encryption is currently only implemented for GnuPG.