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[uid67551@gateway/web/irccloud.com/x-zzrhunhduhqeemie] has joined #bitcoin-wizards 08:48 -!- kankles [~kankles@162.216.46.162] has joined #bitcoin-wizards 08:57 -!- nonaTure [~nonaTure@46.10.50.32] has quit [Ping timeout: 258 seconds] 08:58 -!- nonaTure [~nonaTure@94.236.254.87] has joined #bitcoin-wizards 09:14 -!- alferz [~alferz@unaffiliated/alfer] has quit [Ping timeout: 244 seconds] 09:25 -!- propumpkin [~copumpkin@haskell/developer/copumpkin] has joined #bitcoin-wizards 09:26 -!- copumpkin [~copumpkin@haskell/developer/copumpkin] has quit [Ping timeout: 258 seconds] 09:31 -!- igno_peverell [~igno_pev@gateway/tor-sasl/ignopeverell/x-86067662] has joined #bitcoin-wizards 09:38 -!- dashous [~G@186.18.196.204] has quit [Read error: Connection reset by peer] 09:42 < nsh> .tw laurilovex 09:42 < yoleaux> TIL @zcashco intends to eventually switch elliptic curves in a year due to this attack. http://ellipticnews.wordpress.com/2016/05/02/kim-barbulescu-variant-of-the-number-field-sieve-to-compute-discrete-logarithms-in-finite-fields/ (@lopp, retweeted by @LauriLoveX) 09:42 < nsh> .title https://github.com/zcash/zcash/issues/714 09:42 < yoleaux> understand the concrete security level of the BN_128 curve in libsnark ? Issue #714 ? zcash/zcash ? GitHub 09:42 < nsh> .title https://github.com/scipr-lab/libsnark/issues/29 09:42 < yoleaux> Change BN128 to use 448-bit field size ? Issue #29 ? scipr-lab/libsnark ? GitHub 09:42 < nsh> presumably this is a pretty hard fork 09:42 < nsh> might be worth watching 09:44 < nsh> -- 09:44 < nsh> We decided (it was my call to make) that BN_128 is safe enough for Zcash "Sprout" 1.0. I think we should upgrade it eventually (scipr-lab/libsnark#29). To do so will require what blockchain specialists call a "hard fork" -- new transactions are accepted by the new software but rejected by the old software -- but not what the blockchain enthusiasts and the press call a "hard fork" -- contentious, acrimonious, and resulting in two separate communiti 09:44 < nsh> es each with their own blockchain. ? 09:44 < nsh> -- 09:44 < nsh> in fairness you can achieve the latter without even bothering with a software fork at all 09:45 -!- aaaaaa [~aaaaaa@103.5.140.141] has joined #bitcoin-wizards 09:47 -!- aaaaaa_ [~aaaaaa@103.5.140.141] has quit [Ping timeout: 245 seconds] 09:50 -!- igno_peverell_ [~igno_pev@gateway/tor-sasl/ignopeverell/x-86067662] has joined #bitcoin-wizards 09:51 < zmanian> To the best of my knowledge, the requirements of a SNARK suitable pairing group are a superset of the requirements for other use cases for pairing curves. Hopefully the broader pairing user community can converge on a common set of parameters and then we can invest the effort in constant time scalar multiplication in the elliptic curve groups. 09:53 -!- igno_peverell [~igno_pev@gateway/tor-sasl/ignopeverell/x-86067662] has quit [Ping timeout: 245 seconds] 09:57 -!- droark [~droark@c-24-22-123-27.hsd1.or.comcast.net] has joined #bitcoin-wizards 10:12 -!- droark [~droark@c-24-22-123-27.hsd1.or.comcast.net] has quit [Max SendQ exceeded] 10:18 * nsh nods 10:18 -!- AaronvanW [~ewout@207pc74.sshunet.nl] has joined #bitcoin-wizards 10:18 -!- AaronvanW [~ewout@207pc74.sshunet.nl] has quit [Changing host] 10:18 -!- AaronvanW [~ewout@unaffiliated/aaronvanw] has joined #bitcoin-wizards 10:22 -!- dashous [~G@186.18.196.204] has joined #bitcoin-wizards 10:48 -!- AlineGomes [uid198215@gateway/web/irccloud.com/x-cilddlvmaujoaige] has joined #bitcoin-wizards 10:51 -!- Chris_Stewart_5 [~Chris_Ste@unaffiliated/chris-stewart-5/x-3612383] has quit [Ping timeout: 258 seconds] 10:57 -!- priidu [~priidu@unaffiliated/priidu] has joined #bitcoin-wizards 10:58 -!- CrazyLoaf [uid67551@gateway/web/irccloud.com/x-zzrhunhduhqeemie] has quit [Quit: Connection closed for inactivity] 11:13 -!- blackwraith [~priidu@unaffiliated/priidu] has joined #bitcoin-wizards 11:14 -!- priidu [~priidu@unaffiliated/priidu] has quit [Ping timeout: 256 seconds] 11:15 -!- aaaaaa_ [~aaaaaa@103.5.140.141] has joined #bitcoin-wizards 11:18 -!- aaaaaa [~aaaaaa@103.5.140.141] has quit [Ping timeout: 265 seconds] 11:28 -!- sn0wmonster [~yeti@taskhive/developer/sn0wmonster] has quit [Ping timeout: 246 seconds] 11:45 -!- sn0wmonster [~yeti@taskhive/developer/sn0wmonster] has joined #bitcoin-wizards 11:46 -!- aaaaaa [~aaaaaa@103.5.140.141] has joined #bitcoin-wizards 11:49 -!- aaaaaa_ [~aaaaaa@103.5.140.141] has quit [Ping timeout: 250 seconds] 11:56 -!- cluckj [~cluckj@pool-173-49-237-221.phlapa.fios.verizon.net] has quit [Ping timeout: 248 seconds] 11:58 -!- cluckj [~cluckj@pool-173-49-237-221.phlapa.fios.verizon.net] has joined #bitcoin-wizards 12:23 -!- sausage_factory [~priidu@unaffiliated/priidu] has joined #bitcoin-wizards 12:25 -!- blackwraith [~priidu@unaffiliated/priidu] has quit [Ping timeout: 245 seconds] 12:26 -!- ShoaibJahejo [ShoaibJahe@gateway/shell/panicbnc/x-lyejeuiqhyrlsgpn] has quit [Ping timeout: 258 seconds] 12:29 -!- ShoaibJahejo [ShoaibJahe@gateway/shell/panicbnc/x-tjvmjvmpignxbgqh] has joined #bitcoin-wizards 12:37 -!- InquilineKea [~root@c-73-69-184-84.hsd1.ma.comcast.net] has joined #bitcoin-wizards 12:51 -!- ShoaibJahejo [ShoaibJahe@gateway/shell/panicbnc/x-tjvmjvmpignxbgqh] has quit [Ping timeout: 258 seconds] 13:05 -!- danielsocials [~quassel@123.115.244.41] has joined #bitcoin-wizards 13:08 -!- Chris_Stewart_5 [~Chris_Ste@unaffiliated/chris-stewart-5/x-3612383] has joined #bitcoin-wizards 13:09 -!- danielsocials [~quassel@123.115.244.41] has quit [Ping timeout: 246 seconds] 13:15 -!- moctos_ [~anthonyya@172.98.67.90] has joined #bitcoin-wizards 13:17 -!- aaaaaa_ [~aaaaaa@103.5.140.141] has joined #bitcoin-wizards 13:20 -!- aaaaaa [~aaaaaa@103.5.140.141] has quit [Ping timeout: 246 seconds] 13:32 -!- Guyver2 [~Guyver2@guyver2.xs4all.nl] has quit [Quit: :)] 13:36 < gmaxwell> zmanian: I'm doubtful thats going to happen. 13:39 < gmaxwell> First, the distinction between symmetric and non-symmetric pairings is critical for some protocols. Secondly, being sufficiently conservative against all threats will demand different partameters for places willing to tolerate different tradeoffs-- E.g. many applications would be completely fine with using a 500 bit curve, but for others even a 128 bit curve is too much of a performance overhead. 13:40 < gmaxwell> To really escape the recent impovements in structured discrete log, you can't use a curve that uses a six or twelve order extension. That means that you can't use the fast BN curve families... really pushing things into a different set of tradeoffs. 13:48 -!- aaaaaa [~aaaaaa@103.5.140.141] has joined #bitcoin-wizards 13:49 -!- aaaaaa [~aaaaaa@103.5.140.141] has quit [Remote host closed the connection] 13:50 -!- aaaaaa [~aaaaaa@103.5.140.141] has joined #bitcoin-wizards 13:51 -!- aaaaaa_ [~aaaaaa@103.5.140.141] has quit [Ping timeout: 258 seconds] 13:57 -!- ShoaibJahejo [ShoaibJahe@gateway/shell/panicbnc/x-lzrknfwgqrypwsve] has joined #bitcoin-wizards 14:00 -!- LeMiner [LeMiner@unaffiliated/leminer] has joined #bitcoin-wizards 14:25 -!- kenshi84 [~aaa@2400:7800:48db:9100:3085:977:d26c:d8c] has quit [Remote host closed the connection] 14:26 -!- kenshi84 [~aaa@2400:7800:48db:9100:3085:977:d26c:d8c] has joined #bitcoin-wizards 14:30 -!- kenshi84 [~aaa@2400:7800:48db:9100:3085:977:d26c:d8c] has quit [Ping timeout: 258 seconds] 14:34 -!- metric_ [~metric@199.127.226.246] has quit [Quit: No Ping reply in 180 seconds.] 14:36 -!- Uglux [~uglux@unaffiliated/uglux] has joined #bitcoin-wizards 14:37 -!- metric [~metric@199.127.226.246] has joined #bitcoin-wizards 14:45 -!- metric_ [~metric@199.127.226.246] has joined #bitcoin-wizards 14:46 -!- kenshi84 [~aaa@27.179.138.210.rev.vmobile.jp] has joined #bitcoin-wizards 14:46 -!- metric [~metric@199.127.226.246] has quit [Ping timeout: 264 seconds] 14:49 -!- aaaaaa_ [~aaaaaa@103.5.140.141] has joined #bitcoin-wizards 14:51 -!- aaaaaa [~aaaaaa@103.5.140.141] has quit [Ping timeout: 250 seconds] 14:58 -!- harrymm [~wayne@104.222.140.117] has quit [Ping timeout: 246 seconds] 15:06 < waxwing> i haven't seen it mentioned here yet, should be of interest: https://twitter.com/real_or_random/status/812379888426557440 15:07 < waxwing> ValueShuffle - coinshuffle with CT seems to be the general idea 15:07 < zmanian> so Identity Based Encryption, Threshold Encryption, short group signatures, not interactive aggregate signatures and SNARKS could potentially use the same curve parameters which could result in better tested, more secure software. Or some of those use cases avoid the recent structured discrete log advancements on BN curves by using other pairings. 15:13 < gmaxwell> waxwing: ya, if you go look at the RPC api in elements alpha, we specifically set it up to make it easy to combine CT with coinjoin. 15:14 < gmaxwell> I never did manage to talk someone into setting up a CJ using it though. 15:17 -!- harrymm [~wayne@104.238.32.154] has joined #bitcoin-wizards 15:25 < waxwing> without looking into it, i guess the point is that you can have the commitments separately add to zero? or f*H for fees. 15:26 < gmaxwell> Yea, the API basically lets you ask for a transaction who's blinding factors don't add up to zero but add to some other user specified constant. 15:26 < gmaxwell> Then the N users pick N-1 random values, compute the Nt so the n values sum to zero and use those as the CT offsets. 15:27 < gmaxwell> then as a whole the transaction adds to zero but an observer that doesn't know the random values can't split apart the transaction. 15:30 < waxwing> yes the paper's statement "it is not clear that the 15:30 < waxwing> trust models of CT and P2P coin mixing can be made compatible" was surprising to me, unfortunately it seems like they didn't know it had already been addressed (and even offhand, it seems like it shouldn't be so hard) 15:30 -!- q4 [~q4@user-94-254-168-128.play-internet.pl] has joined #bitcoin-wizards 15:30 < waxwing> still, doesn't mean there isn't interesting stuff there (i haven't read it all) 15:31 < waxwing> gmaxwell: your description above sounds like only a small step away from MW :) 15:32 < gmaxwell> I think I described interactions with CJ in one of my CT writeups. In any case, if they worked out the concrete details for choosing offsets that add to zero so that no one learns the any more than there own, than thats useful. It was obvious enough to me that it was possible to do so, but I certantly didn't work out the details. 15:45 -!- kenshi84 [~aaa@27.179.138.210.rev.vmobile.jp] has quit [Remote host closed the connection] 15:55 -!- sausage_factory [~priidu@unaffiliated/priidu] has quit [Ping timeout: 248 seconds] 15:55 -!- moctos_ [~anthonyya@172.98.67.90] has quit [Read error: Connection reset by peer] 16:02 -!- droark [~droark@c-24-22-123-27.hsd1.or.comcast.net] has joined #bitcoin-wizards 16:12 -!- moctos_ [~anthonyya@172.98.67.126] has joined #bitcoin-wizards 16:31 -!- kenshi84 [~aaa@103.5.140.151] has joined #bitcoin-wizards 16:33 -!- CrazyLoaf [uid67551@gateway/web/irccloud.com/x-otwusvgfauwmqbqs] has joined #bitcoin-wizards 16:49 -!- q4 [~q4@user-94-254-168-128.play-internet.pl] has quit [Quit: My MacBook has gone to sleep. 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host closed the connection] 17:36 -!- Uglux [~uglux@unaffiliated/uglux] has quit [Write error: Broken pipe] 17:36 -!- uiuc-slack [~uiuc-slac@173.230.135.104] has joined #bitcoin-wizards 17:38 -!- uiuc-slack [~uiuc-slac@173.230.135.104] has quit [Remote host closed the connection] 17:38 -!- uiuc-slack [~uiuc-slac@li175-104.members.linode.com] has joined #bitcoin-wizards 17:40 -!- kenshi84_ [~aaa@103.5.140.151] has joined #bitcoin-wizards 17:40 -!- kenshi84 [~aaa@103.5.140.151] has quit [Read error: Connection reset by peer] 17:44 -!- uiuc-slack [~uiuc-slac@li175-104.members.linode.com] has quit [Remote host closed the connection] 17:45 -!- uiuc-slack [~uiuc-slac@li175-104.members.linode.com] has joined #bitcoin-wizards 17:56 -!- kenshi84_ [~aaa@103.5.140.151] has quit [Remote host closed the connection] 17:57 -!- kenshi84 [~aaa@103.5.140.151] has joined #bitcoin-wizards 17:58 -!- kenshi84 [~aaa@103.5.140.151] has quit [Read error: Connection reset by peer] 17:58 < instagibbs> I haven't put any thought into it, but the "blame phase" stuff might not be obvious 17:58 -!- kenshi84 [~aaa@103.5.140.151] has joined #bitcoin-wizards 18:00 -!- kenshi84 [~aaa@103.5.140.151] has quit [Remote host closed the connection] 18:00 -!- kenshi84 [~aaa@103.5.140.151] has joined #bitcoin-wizards 18:12 * nsh tires to restate the problem 18:13 < nsh> N people to interactively choose integer nonces that sum to zero without any one participant or cohort being able to deduce the nonce of another, or re-sum to zero without another's nonce? 18:13 < nsh> s/another/a subset/ 18:14 < nsh> s/nonce/offset/ 18:20 -!- kenshi84 [~aaa@103.5.140.151] has quit [Remote host closed the connection] 18:20 -!- kenshi84 [~aaa@103.5.140.151] has joined #bitcoin-wizards 18:21 -!- arowser [~quassel@106.120.101.38] has quit [Remote host closed the connection] 18:22 -!- arowser [~quassel@106.120.101.38] has joined #bitcoin-wizards 18:26 -!- NewLiberty [~NewLibert@2602:306:b8e0:8160:548f:c9dc:89eb:1d9e] has joined 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