+## (how to encrypt and optionally sign the backups)
+##
+## WARNING: old (pre-0.9.4) example.dup used to give wrong information about
+## the way the following options are used. Please read the following
+## carefully.
+##
+## If the encryptkey variable is set:
+## - data is encrypted with the GnuPG public key specified by the encryptkey
+## variable
+## - if signing is enabled, data is signed with the GnuPG private
+## key specified by the signkey variable
+## - the password variable is used to unlock the GnuPG key(s) used
+## for encryption and (optionnal) signing
+##
+## If the encryptkey option is not set:
+## - data signing is not possible
+## - the password variable is used to encrypt the data with symmetric
+## encryption: no GnuPG key pair is needed