Securing webmethods webservice selectively using policy files.

Hi,
I am using wse3.0 to secure webservice.
I have two web methods in this webservice
viz. HelloWorldWithSecurity.
HelloWorldWithOutSecurity.

1) Can I secure only HelloWorldWithSecurity and leave
HelloWorldWithOutSecurity not secured ?

Is it always necessary to specify the Policy attribute for the class in
the webservice if we are using the policy method to secure webservices
?
eg.

[WebService(Namespace = "http://www.contoso.com/";)]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[Policy("ServicePolicy")] // is this necessary ???
public class Service : System.Web.Services.WebService
{
public Service () {

}

[WebMethod]
public string HelloWorldWithSecurity() {
return "Hello World with security";
}
[WebMethod]
public string HelloWorldWithOutSecurity() {
return "Hello World without security";
}

}

2) Can requestAction attribute of the protection element be used for
this ?


The problem I am facing is - If i dont specify the Policy attribute for
the class none of the methods are secured.

If I use the policy attribute all of them are secured irrespective of
the method name in the request action attribute.

Can anyone help me out with this ???
Thanks.

.