On 18/09/15 15:17, Rune Kjær Svendsen via bitcoin-dev wrote: > Bitcoin does not function if the majority of mining power is dishonest. There > is no way around that. It’s how proof-of-work functions.
None of those statements are true. If a majority of Bitcoin miners are mining invalid blocks, then they aren't Bitcoin miners any more and are no longer relevant to the Bitcoin consensus. There does exist a problem that light clients aren't always able to tell the difference between chains that are valid and chains that are not valid, but it's is possible to create simple proofs that would do so: https://gist.github.com/justusranvier/451616fa4697b5f25f60 If those changes would be implemented, then any node that knew a chain was invalid could produce a compact proof that anyone else in the network could verify, regardless of how much proof of work was used to create the invalid chain. Committed UTXO sets would need safe to rely upon if a similar set of proofs that a particular set was invalid existed. -- Justus Ranvier Open Bitcoin Privacy Project http://www.openbitcoinprivacyproject.org/ jus...@openbitcoinprivacyproject.org E7AD 8215 8497 3673 6D9E 61C4 2A5F DA70 EAD9 E623
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