basic authentication with cxf-bc consumer

[will.mad]

Hi,
My ESB exposes some web services endpoint using a cxf-bc consumer 
component. I would like to add basic authentication in order to force 
client applications calling my web services to provide a 
username/password. I tried to configure my cxf component by specifing an 
cxf bus configuration but it has no effect.

Here is my configuration :

xbean.xml for cxf-bc consumer :
<cxfbc:consumer wsdl="classpath:wsdl/provider/AlarmWS.wsdl"
                      endpoint="AlarmWSPort"
                      service="alarm:AlarmWS"
                      targetEndpoint="AlarmCamelEndpoint"
                      targetService="alarm:AlarmCamelService"
                      busCfg="basic_auth.xml"
                      useJBIWrapper="false"/>

basic_auth.xml :
<http:conduit name="*.http-conduit">
<http:authorization>
<sec:UserName>firefly</sec:UserName>
<sec:Password>serenity</sec:Password>
</http:authorization>
</http:conduit>

This configuration has no effect and my services are still accessible 
without username/password. Is there something missing? Is it possible to 
add authentication to exposed web services (cxfbc-consumer).

Regards
William