SSO Using F5 with Siebel IP 17

We are trying to deploy Siebel IP 17 and trying to achieve a SSO. While as per the Oracle Article:

 

https://support.oracle.com/epmos/faces/DocumentDisplay?_afrLoop=8925604632427&parent=SrDetailText&sourceId=3-18004657081&id=2410486.1&_afrWindowMode=0&_adf.ctrl-state=1bbno9xhrc_167

 

However, instead of the IIS layer or the OAM layer, we want to use the F5 APM and LTM to provide SSO.

 

In the SSO configuration from Siebel, it is expecting a value called "Trust Token" and "User Specification", which we believe is a value from the IIS Server. Any ideas on how this kind of solution can be achieved.