[B<-des3>]
[B<-idea>]
[B<-rand file(s)>]
+[B<-engine id>]
[B<paramfile>]
=head1 DESCRIPTION
The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for
all others.
+=item B<-engine id>
+
+specifying an engine (by it's unique B<id> string) will cause B<req>
+to attempt to obtain a functional reference to the specified engine,
+thus initialising it if needed. The engine will then be set as the default
+for all available algorithms.
+
=item B<paramfile>
This option specifies the DSA parameter file to use. The parameters in this