#bitcoin-wizards on 2019-06-21 — irc logs at freenode.irclog.whitequark.org

2015-10-30 00:53 sipa changed the topic of #bitcoin-wizards to: This channel is for discussing theoretical ideas with regard to cryptocurrencies, not about short-term Bitcoin development | http://bitcoin.ninja/ | This channel is logged. | For logs and more information, visit http://bitcoin.ninja

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06:12 <kallewoof> I am writing signet (a test network for bitcoin where there is a centralized signer that signs blocks), and would like to double check that my approach is actually a-OK: the signer right now signs version, hashPrevBlock, witnessMerkleRoot, nTime, and nBits. They do not sign the actual transactions or merkle root, as that would introduce a circular dependency (the signature is in the coinbase). The only attack I can think

06:12 <kallewoof> of is that someone could mine another block identical to this one and put the same signature into it. Are there any other gotcha's with this approach?

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14:57 <kallewoof> I got feedback. The above is annoying as someone could remake a bunch of blocks with different coinbase and stuff them with the above sig so I think the final approach will be to make a new merkle root which excludes the signet sig and commits to that (i.e. "legacy tx signature approach")

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