#bitcoin-wizards on 2019-07-02 — 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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16:45 <kanzure> "How to simultaneously exchange a secret bit by flipping a symmetrically-biased coin" https://ieeexplore.ieee.org/document/4568055

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16:46 <kanzure> "Rational secret sharing and multiparty computation" https://arxiv.org/pdf/cs/0609035.pdf namely the first half of section 1

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17:25 <mappum> Has anyone ever explored the idea of federated lightning hubs? I think you could have a signatory set do everything a lightning node needs to do, via musig and Pedersen secret sharing

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19:15 <digi_james> adiabat: Hello, I enjoyed the utreexo paper very much and am looking to better understand some lingering questions. Many thanks in advance!

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19:16 <digi_james> 1) For a compact state node with fully pruned Pollard forests (just roots), it would seem adding/subtracting accumulator would require more than just the UTXO proofs from bridge nodes. I am unsure of how such a verifying node with pruned forests would figure out which nodes it would need in addition to the proofs ...

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19:16 <digi_james> ... is this algo documented somewhere or described in the pollard.go class? I believe the paper only describes operations on full forests.

19:16 <digi_james> 2) In your presentation with IBD with 11GB memory dedicated to the UTXO accumulator and no bandwidth (proof) used, I presume no additional accumulator data was stored on disk? For all these examples, all accumulators were stored in memory, no disk, is this correct?

19:16 <digi_james> 3) I am wondering whether a memory-mapped file storing the accumulator could further help reduce RAM and bandwidth usage? Short-lived UTXO will be on the warm side and tend to reside in memory, but parts of forest can be retrieved from disk by OS when needed.

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