Is proof-of-stake secure?

However, it is easily understandable that proof-of-stake is more secure and less resource-intensive than proof-of-work, but some drawbacks still need further attention. Although a PoS blockchain has never been hacked, individual nodes have been attacked.

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What is proof-of-work in Ethereum?

Proof-of-work is the mechanism that allows the decentralized Ethereum network to come to consensus, or agree on things like account balances and the order of transactions . This prevents users from “double spending” their coins and ensures that the Ethereum chain is tremendously difficult to attack or manipulate.

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