id author title date pages extension mime words sentences flesch summary cache txt blog-ethereum-org-6559 On Stake | Ethereum Foundation Blog .html text/html 5006 231 67 In proof of work, assuming a liquid market for computing power the cost of launching a 51% attack is equal to the cost of the computing power of the network over the course of two hours an amount that, by standard economic principles, is roughly equal to the total sum of block rewards and transaction fees provided in two hours. The reason why it works is that Slasher's process for punishing multi-mining only lasts for 1000 blocks, and its process for determining new miners lasts 3000 blocks, so outside the "scope" of that range Slasher functions exactly like the naive proof-of-stake coin. When a new user downloads a proof-of-stake-coin client for the first time, it will see multiple versions of the blockchain: the longest, and therefore legitimate, fork, and many pretenders trying to mine their own chains from the genesis. ./cache/blog-ethereum-org-6559.html ./txt/blog-ethereum-org-6559.txt