0 sats \ 2 replies \ @BTCMiner 21 Feb 2023 \ on: Is fusion energy a risk for Bitcoin? bitcoin
a company or a state could obtain a large amount of the hashrate thanks to an abundant and cheap energy
And then do what?
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25 sats \ 1 reply \ @JulienPH OP 21 Feb 2023
Censoring transaction, or even mine from the previous block and take advantage of the double spending
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1 sat \ 0 replies \ @BTCMiner 21 Feb 2023
Mining a block that conflicts with an existing block but then becomes part of the chain with the "greatest work" is called a blockchain reorg. It is not a frequent occurrence, but bitcoin's design can handle that. And that attacker can only double spend their own transactions.
Censoring some (or all) transactions is definitely something a miner with 301 EH/s (of the total 601 EH/s .... which is the existing network's 300 EH/s plus the attacker's 301 EH/s) is certainly capable of doing. It's the finding and operating the 301 EH/s hashrate that I doubt even the most motivated nation state would be able (nonetheless willing) to pull off.
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