Questions tagged [proof-of-work]

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What is the complexity ratio of Tezos Proof of Stake algorithm compared to the Proof of Work algorithm of Bitcoin? [closed]

I want to compare the Proof of Stake in Tezos to Proof of Work in Bitcoin. My assumption is that it is far more cheap in complexity to do that in Tezos as the calculation is not involved to the Proof. ...
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Is a 51% attack possible in Tezos?

I was reading there was a recent 51% attack to Ethereum. Basically, hackers rented enough computer power to get 51% of the mining power, and insert false transactions into the blockchain. I wonder ...