Protecting the pits

I haven't read the Inel Guard standard, I should.  If, and before, I think two simple principals protect the hardware.

The processor needs to keep two keys, unread by humans. One key iunderstood by the foundry, and one known only to the local processor.  Both counterfeit proof by assumption.

From there we have hardware protection of a memory segment, it is in accessible accept indirectly via exec call, into the protected segment.  Memory set at hardware reset.

But, a lot of details done by Intel make this  as best we have it. Thus, like block chain, and group of processors can be validated independently, by checksum. If one packet bears the secret encryption, it is valid, as the protocol is valid at the processor.

So, who cares about rolling back all the transactions? Except digital assets I mean? If we deal with currency, then, says the sandbox, we need only remember as far back as the currency tradebook is uncertain.  Currency has finite 'block chain' structure, and as adaptable as the finite buy and sell queues can be organized by significance. This is not a ledger business, what goes on is barely visible to the humans.