What is a 51% attack in blockchain?
A 51% attack occurs when a single entity gains control of more than 50% of a blockchain's mining power, allowing them to manipulate the network.
What can happen during a 51% attack?
During a 51% attack, the attacker can double-spend coins, prevent transactions from being confirmed, and potentially disrupt the entire network.
How can blockchain networks prevent 51% attacks?
Blockchain networks can prevent 51% attacks by increasing decentralization, using different consensus mechanisms, and implementing security measures.
Are there any real-world examples of 51% attacks?
Yes, notable examples include the attacks on Ethereum Classic in 2019 and Bitcoin Gold in 2018, where attackers gained majority control.
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