While, NNS provides to Chainkey to coordinate the consensus on its subnets. Considering this scenario, 9/13 subnet nodes fakes the transaction to modify the on-chain by modify the node’s code to pass verification. If the subnets are open, we can then find the Nodes are cheating by figuring who fakes the data because you can’t fake signature with wrong private key. But if the subnets are not open. Nobody knows.
And for privacy, the end users don’t know the data, but the node providers do. Then you have to trust the node provider to keep your secret. With SEV, then you will have to trust AMD to keep your privacy and the nodes need to be configured properly. That means you have to trust the infrastructure to keep your privacy. That simply violates the principle of blockchain as a trustless network. Why not use AWS then?
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