51% attack
A 51% attack lets one miner control most of a blockchain’s power—enabling double spending and invalidating honest transactions.
A 51% attack lets one miner control most of a blockchain’s power—enabling double spending and invalidating honest transactions.
When the mining reward is low, it is logical that only a few miners validate blocks. At this point, a miner can easily hold 51% of the network's computing power. This is when a 51% attack occurs. The miner can then start mining fraudulent transactions, such as double spending, and invalidate other transactions.
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