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Mining stale low-difficulty blocks as a DoS attack

Bitcoin determines the best chain by choosing the one with the most work. As "work" is a bit nebulous, it is specifically determined using a metric called "chainwork". Chainwork is ...
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Can miners single handedly perform 51 attack toward the network?

51% attack My understanding is that the 51% attack only requires more than 50% of the total hashpower. It doesn't require control over a majority of nodes. Nodes each choose the chain with most work ...
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