#bitcoin-wizards on 2020-12-29 — 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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10:53 <tromp> is there any discussion about why Liquid chose Pedersen commitments over El-gamal ones for its Confidential Transactions?

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17:13 <nsh> someone proposed using elgamel for 'switch commitments' (CT that can be toggled on when security environment warrants it) - https://allquantor.at/blockchainbib/pdf/ruffing2017switch.pdf

17:13 <nsh> the emphasis between binding and blinding is slightly different i think

17:13 <nsh> bulletproofs is elgamal all the way https://web.stanford.edu/~buenz/pubs/bulletproofs.pdf which it notes as being pederson commitment with additional commitment to the randomness

17:14 <nsh> which presumably has implications for aggregation of rangeproofs

17:14 <nsh> andytoshi/gmaxwell would be best qualified to answer i guess

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17:20 <andytoshi> nsh: yeah, BPs are totally incompatibly with elgamal commitments (or switch commitments)

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17:21 <andytoshi> you can't even produce single bulletproofs, let alone aggregate them

17:22 <andytoshi> having said that ... the idea with switch commitments is that in the early days nobody is actually validating the extra point of the elgamal commitment, it's just laying around. and so you can use bulletproofs

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17:22 <andytoshi> but then after the switch, you have to go back to (a variant of) the old-school rangeproofs

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17:29 <nsh> hmm

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18:52 <FreeCake> Odds Amazon accepts Bitcoin in the future?

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