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Are you aware of any practical SHA-256 collision attacks? What do you expect the results would be, if within the next few days it were discovered that there we
by gojomo 6y ago
Are you aware of any practical SHA-256 collision attacks?
What do you expect the results would be, if within the next few days it were discovered that there were two different files, with the same SHA-256, each claiming to be the Bitcoin-0.21.1 release?
- nullc 5y agoIf you know a sha256 collision the bitcoin network will currently pay you about 0.476 BTC (~about $26k USD right now) to publish it. https://blockstream.info/address/35Snmmy3uhaer2gTboc81ayCip4m9DT4ko https://blockstream.info/address/35Snmmy3uhaer2gTboc81ayCip4... https://blockstream.info/address/39VXyuoc6SXYKp9TcAhoiN1mb4ns6z3Yu6 https://blockstream.info/address/39VXyuoc6SXYKp9TcAhoiN1mb4n... https://blockstream.info/address/3DUQQvz4t57Jy7jxE86kyFcNpKtURNf1VW https://blockstream.info/address/3DUQQvz4t57Jy7jxE86kyFcNpKt...
- drexlspivey 5y agoIn practice, if you try to claim those coins by broadcasting a transaction with the collision the most likely outcome is someone will snatch the coins by changing the output address with his own address (since the scripts contains no signature checking). You would have to give your tx straight to a miner (and hope for the best)
- gojomo 5y agoBut also, in practice, the fame of announcing such a discovery (with or without an explanation of the method for creating it) could be worth more than $26k. And if you wanted to profit from it, via submitting the transaction or not, you could likely make far more by speculating on the effects of that announced collision on the Bitcoin price – likely sharply negative.