任何对网络的攻击和修改区块链的尝试都需要足够的计算能力来确认多个区块,然后网络的其他部分才能验证账本的准确性。对于比特币(BTC -0.32%)或以太坊(ETH -1.08%)等流行的区块链来说,这种攻击的代价高得令人望而却步。
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