How can we test Security for Webservices using webservices Addin in QTP

[RaghunadhKiran]

Hi,
My application(i would say a tool) is different and does not have any frontend, its jus a medium which establishes communication between different applications. the communication is with web services. So to test this, i have taken QTP and webservices addin.

here is the scenario, i have read the wsdl link thru webservices startup, and thru Data Table i am giving the Service and Request thru xml file, and capturing the Response into an xml file.
i have couple of questions
1. Can we dinamically read the wsdl link from Datatable, in that case do Object repository gets changes what can be done?
2. How can we do Security check for the Request and Response.
3. we have mediums in between which our request will be processed, i wanted to check the Route and confirm that our request ha passed thru the meduim.
Please suggest me how can i do dis thru QTP.
Thanks
Raghunadhkiran.