#bitcoin-wizards on 2018-09-28 — 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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10:23 <RubenSomsen> Is there anywhere I can read about g'root?

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16:15 <CTnoob> Hello

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16:16 <CTnoob> Would anyone be interested in reviewing my primer to Confidential Transactions? It doesn't go in-depth. Just a high level overview of it.

16:17 <CTnoob> https://docs.google.com/document/d/1tyYvgqh76Tl_Z1FtO9Gop2iAzB9EeURC5vnzwnXpQdg/edit?usp=sharing

16:19 <waxwing> heh, 1^3 + 2^3 = 3^3 reminds me of the 'sophomore's dream' :) https://en.wikipedia.org/wiki/Sophomore's_dream

16:20 <CTnoob> sounds too good to be true... :-P

16:21 <waxwing> as stated in the doc it's wrong though :)

16:21 <waxwing> you talked about squaring and 3^2 is indeed 9 but unfortunately 3^3 isn't.

16:22 <CTnoob> oh shnap! My bad. Thanks for that. Will need to find a different example.

16:23 <waxwing> yes interesting thought pedagogically .. perhaps go with the old (a + b)^2 = a^2 + b^2 ?

16:23 <waxwing> what's that, the high-schooler's dream maybe? :)

16:24 <waxwing> true in some number systems ofc ;)

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16:26 <CTnoob> That's a much better example. I think as it conveys the general idea that is enough, even if it fails in some number systems.

16:26 <CTnoob> ty vm

16:35 <CTnoob> Hm... would it be better if I just used this formula? (a +b) 2 = a*2 + b*2

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18:13 <tromp> reading https://eprint.iacr.org/2018/601.pdf on verifiable delaty functions. page 3 says x^{(p-1)/2} = 1 mod p for nonzero x and p=13 mod 4

18:14 <tromp> but this is false for e.g. x=2, p=11

18:17 <tromp> it only holds for quadratic residues x

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18:23 <tromp> oh, above shld say p=3 mod 4

18:31 <gmaxwell> tromp: reconizing the formula above, you might also be interested in https://en.wikipedia.org/wiki/Permutation_polynomial#Small_degree

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21:43 <sipa> RubenSomsen: Anthony Towns' email to the ml in july this year, titled Generalised Taproot

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