wsHttpBinding Message Security

Hi,

I have a service setup that uses the following binding.

<bindings>

<wsHttpBinding>

<binding name="NewBinding">

<security mode="TransportWithMessageCredential">

<message negotiateServiceCredential="false" />

</security>

</binding>

</wsHttpBinding>

</bindings>

Now when this service runs the contents of the soap message are signed. I was just wondering if it is possible to just send the Kerberos token for Message authentication and not worry about signing and encryption.