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Miners are incentivized to validate both transactions and proof of work because if they start mining a new block on top of an invalid block any block they successfully mine won't be accepted by the full nodes and other miners on the network. Therefore the energy expended on finding a proof of work will be wasted. (Each block header refers to the hash of the ...


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Yes, these kinds of attack do effect Bitcoin and are known and described. Bitcoin does not have any consensus level mitigations for them because doing so requires consensus changes which are difficult to do. It is known that Bitcoin's merkle tree design has multiple vulnerabilities. The particular attack described on wikipedia is that an internal level can ...


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