The install.txt says " the TSSCoreDxx package can be ignored". However you can't build the IWxxTSSUIDxx package as it references that core.
However, the latest TMS Security Core is - TMSVCLSecuritySystemPkgCoreXXX
So, what is the correct way to install TMS Intraweb Security ?
(you can't build the TSSCore, as you get implicit duplicate warnings from the new Security Core)
Unfortunately the current TMS IntraWeb Security System packages are not yet compatible with the new TMS VCL Security System package system.
As a workaround you can remove the TTSCoreDxx reference in the IWxxTSSUIDxxupd package and replace it with a reference to TMSVCLSecuritySystemPkgCoreDxx