--- Log opened Sat Jan 26 00:00:31 2019
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08:01 < kanzure> "ZeroCT: Improving ZeroCoin with Confidential Transactions and more" https://eprint.iacr.org/2019/072.pdf
08:02 < kanzure> "Publicly verifiable proofs from blockchains" https://eprint.iacr.org/2019/066.pdf
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08:06 < kanzure> "Efficient non-interactive zero-knowledge proofs in cross-domains without trusted setup" https://eprint.iacr.org/2019/063.pdf
08:08 < kanzure> "A formal treatment of hardware wallets" https://eprint.iacr.org/2019/034.pdf
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08:16 < kanzure> "Minimizing trust in hardware wallets with two factor signatures" https://eprint.iacr.org/2019/006.pdf (simple threshold signature 2-of-2 scheme?)
08:17 < kanzure> switch commitments https://github.com/mimblewimble/grin/pull/2157
08:19 < nsh> latter based off https://eprint.iacr.org/2017/237.pdf i believe
08:19 < nsh> Switch Commitments: A Safety Switch for Confidential Transactions / Tim Ruffing and Giulio Malavolta
08:20 < nsh> ie, in this case, if nontrivial ecDLP generator relations are found then the commitment security switches to elGamel
08:20 < nsh> if i've understood correctly
08:21 < real_or_random> yeah that's the basic idea
08:21 < nsh> but also switching between computational and statistical blinding
08:21 < real_or_random> but what grin implemented is a better variant which is not described in the paper
08:22 < real_or_random> (we should update the paper at some point...)
08:22 < nsh> oh nice
08:22 < waxwing> deploy first, write paper later :)
08:22 < nsh> :)
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08:24 < real_or_random> it's described here https://lists.launchpad.net/mimblewimble/msg00479.html the advantage is that it is opt-in in the sense that later each user can individually decide whether he wants to risk privacy and get the money back or just do nothing and keep privacy. and this decision can be postponed essentially forever
08:25 < nsh> that's very neat
08:26 < real_or_random> and there are more advantages mentioned in that post, primarily that it does not have storage overhead (before the switch at least)
08:28 < nsh> look forward to the thesis :)
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08:34 < waxwing> that 063.pdf looks interesting
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08:48 < nsh> "The prover then performs the MPC computation using the values x1,x2,x3 and given a challenge e ∈ {1,2,3} returns the view of computations performed with inputs x_e and x_e+1. Executing these steps a number of times decreases the soundness error of the proof."
08:48 < nsh> naively it would seem to me that repeating this would reveal more of the missing bit of the MPC
08:48 < nsh> but i presume it doesn't somehow, which speaks to my naivete more than anything i guess
08:50 < nsh> there is only a finite amount of circuit complexity and revealing a third of it over and over seems like it should return cumulatively more of it. i suppose in the context of pederson commitments any finite missing part is enough
08:51 < nsh> as there's no notion of closeness that doesn't still require nontrivial discrete logarithm relations to close up completely
08:53 < nsh> oh i see, the XOR commitment to 2/3rds of the MPC is very elegant
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09:17 < nsh> was somebody working on a circuits implem of bulletproofs? i have this vague but pretty strong recollection of seeing a github issue/PR/update or something about circuits under bulletproofs
09:17 < nsh> but sometimes i just imagine/dream things
09:18 < nsh> .title https://github.com/ElementsProject/secp256k1-zkp/pull/16/commits/aa6c5fd44f6febaf6143caee5f8f5caab47c2e55
09:18 < yoleaux> WIP: bulletproofs by apoelstra · Pull Request #16 · ElementsProject/secp256k1-zkp · GitHub
09:19 < nsh> (add circuit support), WIP
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--- Log closed Sun Jan 27 00:00:32 2019