I was hoping by now one of the super techies on board would have cracked what was taking place between all those devices.
I believe one of the technologies involved is key management taking place between the devices via a cloud server.
Where the keys are stored on the device(s)is a guess. We know a TPM/MTM/Secure Element/SED are good secure ways to store keys versus the OS but in the absence of a technical white paper expaining it, well we are left guessing.