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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<waxwing->
just a vague thought, but might there be any way to have some kind of HTLC (or just hash-locked) such that the two redemptions expose different strings (and only the participants can see the connection). so snoopers cannot link.
<waxwing->
i'm thinking, the main reason you can't is because hash functions don't have a homomorphism, if you could prove to cntrprty that H2 was H(x+N) when you'd only revelead H(x) and N to them, then you could do it.
<waxwing->
you could easily get that effect with elliptic curve points, but i don't think you could put that in a script(?)
<andytosh1>
waxwing-: correct, doing this with EC points was suggested on the lightning list some time ago (and i cannot find the link now :() but wasn't used because of the lack of script support
<andytosh1>
proving a relationship between H(x+N) and H(x) seems to require snarks
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<waxwing->
right, thanks. yes i could see it being of more interest in lightning (or, well, any scenario where such redemptions were at least common enough that the intra-group fungibility is important)
<waxwing->
doesn't really help for fungibility with everyone else, much, since you're already in custom redeem script land. or whatever.
<andytosh1>
yeah, for that you need scriptless scripts ;)