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<kanzure> "ZeroCT: Improving ZeroCoin with Confidential Transactions and more" https://eprint.iacr.org/2019/072.pdf
<kanzure> "Publicly verifiable proofs from blockchains" https://eprint.iacr.org/2019/066.pdf
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<kanzure> "Efficient non-interactive zero-knowledge proofs in cross-domains without trusted setup" https://eprint.iacr.org/2019/063.pdf
<kanzure> "A formal treatment of hardware wallets" https://eprint.iacr.org/2019/034.pdf
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<kanzure> "Minimizing trust in hardware wallets with two factor signatures" https://eprint.iacr.org/2019/006.pdf (simple threshold signature 2-of-2 scheme?)
<nsh> latter based off https://eprint.iacr.org/2017/237.pdf i believe
<nsh> Switch Commitments: A Safety Switch for Confidential Transactions / Tim Ruffing and Giulio Malavolta
<nsh> ie, in this case, if nontrivial ecDLP generator relations are found then the commitment security switches to elGamel
<nsh> if i've understood correctly
<real_or_random> yeah that's the basic idea
<nsh> but also switching between computational and statistical blinding
<real_or_random> but what grin implemented is a better variant which is not described in the paper
<real_or_random> (we should update the paper at some point...)
<nsh> oh nice
<waxwing> deploy first, write paper later :)
<nsh> :)
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<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
<nsh> that's very neat
<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)
<nsh> look forward to the thesis :)
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<waxwing> that 063.pdf looks interesting
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<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."
<nsh> naively it would seem to me that repeating this would reveal more of the missing bit of the MPC
<nsh> but i presume it doesn't somehow, which speaks to my naivete more than anything i guess
<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
<nsh> as there's no notion of closeness that doesn't still require nontrivial discrete logarithm relations to close up completely
<nsh> oh i see, the XOR commitment to 2/3rds of the MPC is very elegant
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<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
<nsh> but sometimes i just imagine/dream things
<yoleaux> WIP: bulletproofs by apoelstra · Pull Request #16 · ElementsProject/secp256k1-zkp · GitHub
<nsh> (add circuit support), WIP
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