 SSLIOP pluggable transport in TAO alone.  This allows one
to secure application requests without modifying the application code.
This is the easiest approach but is also the least flexible.
</li>
<li>
Use the Security Service API implemented by TAO in conjunction with
TAO's SSLIOP pluggable transport.  This provides the benefits of
secured application requests with the flexibility of disabling
security in some requests, if so desired.  This approach also allows
one to choose at run-time which X.509 certifi