Users' passwords are stored in the `.ikiwiki/userdb` file, which needs to
be kept safe to prevent exposure of passwords. If the
-[[Authen::Passphrase]] perl module is installed, only hashes of the
+[[cpan Authen::Passphrase]] perl module is installed, only hashes of the
passwords will be stored. This is strongly recommended.
The `password_cost` configuration option can be used to make the stored