If I say “blockchain” enough, I will generate a use case. Believe!https://twitter.com/GeneXusUSA/status/869695178508046336 …
but it's irreversible because the work done mining the blocks is lost... not a simple rewind.
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For a centrally controlled chain, you just rebuild it as it was save for that thing you changed. Merkel trees buy you next to nothing.
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It’s publishing the transaction record that makes it verifiable and that’s more what matters. The crypto is fairly irrelevant.
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