Abt Web service security?

Hi,

I am complete newbie to Webservices, so have very basic question and that is,
if i want to use message level security instead of Transport layer level, then which is better to use , X.509 or kerberos? or any other solution.

Also, I have created a sample application using kerberos, now in order to test that application,Is there any way to check it locally, without having access to KDC server? If not,How to get access to KDC server to get tickets?

Thanx in advance.

[672 byte] By [Prajakta] at [2008-2-17]