I gave you the overarching theory and one specific method in my comment to which you replied. PS The shared secrets I mentioned were not in that context symmetr

I gave you the overarching theory and one specific method in my comment to which you replied. PS The shared secrets I mentioned were not in that context symmetric keys but split keys. A tool will never solve a security problem by creating an optimal design. That requires someone with security knowledge. There are threat modeling tools that can help but only when the tools are used as designed.