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51% attacks against proof of work blockchains have definitely happened in the past[1]. What hasn't happened yet is an attack on proof of stake (or more generall
by baby 1y ago
51% attacks against proof of work blockchains have definitely happened in the past[1]. What hasn't happened yet is an attack on proof of stake (or more generally BFT consensus) as far as I'm aware.
[1]: https://news.ycombinator.com/item?id=18849961 https://news.ycombinator.com/item?id=18849961
- codeflo 1y agoI mean, doesn't Ethereum, probably the most prominent proof-of-stake coin, roll back the consensus whenever something happens that they don't like? It's easy to claim you're algorithm is safe when you're not actually running it.
- baby 1y agoAs far as I'm aware they only did it when they were a proof of work chain