2016-09-07.log

--- Log opened Wed Sep 07 00:00:47 2016
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jedijiis it just really quiet in here or do I need to join a channel?00:33
sipastay a few days00:34
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sipadiscussions only happen occasionally00:34
fluffyponyoh well if they're just going to leave00:35
sipaah.00:36
@gmaxwelltime to start a discussion then00:36
@gmaxwellonly to stop before they join again.00:36
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sipai concur.00:36
fluffyponyhah hah00:37
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sipaThomasV: you're giving a talk tonight in zurich?03:21
ThomasVyes03:21
sipacool03:21
ThomasVhop you'll be there :)03:21
sipai'll attend03:21
ThomasVcool, great03:22
ThomasVI'm just finishing my slides03:22
sipaare you nearby already?03:22
ThomasVyes03:22
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e0_Eliel: the 10 BTC payment to the 2-of-2 is not confirmed beforehand. An attacker could doublespend it, be if an attacker doublespends it with 90% probability, then 10% of the time the attacker will lose 10 BTC.05:27
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Eliele0_: ah, yes, you're right. it isn't profitable on average to do that.05:30
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mryandaowhats the status on confidential transactions that's still sitting in the Elements Project?10:11
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* mryandao waves10:36
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instagibbs_mryandao: it works, what specifically are you wondering about10:48
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mryandaothe links on the elements project page to confidential addresses is broken10:53
kanzureelementsproject.org links to https://elementsproject.org/elements/confidential-transactions/ which seems to work to me10:55
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kanzuremryandao: besides the page you want doesn't exist at the moment https://github.com/ElementsProject/elementsproject.org/blob/94b92363316e9e598afb3044f6db60c86a828e88/source/elements/confidential-transactions/addresses.md10:57
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mryandaoyes that first link works11:09
mryandaoits just the hyperlinks in that page that redirects back to the main page11:09
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vega4I can see there are very different opinions about DASH; can someone tell me why some believe it be a scam? just facts please15:16
@gmaxwellwrong channel.15:17
CocoBTCAsk Junseth on twitter15:18
vega4would you suggest me a better channel? whos Junseth;)15:19
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vega4I checked that guy. Ok I guess it was supposed to be a funny joke15:25
fluffyponyvega4: read the channel topic15:26
fluffyponythen understand why that topic is inappropriate for this channel15:26
CocoBTCvega4: No kind of actually wasn't, he's one guy who's very skeptical to alt-coins in general, he might could give you an answer.15:28
@gmaxwellas an aside, don't bother asking in public for criticism against altcoins. It's almost never in anyones interest to provide you with any.15:28
@gmaxwellbeing criticial of some altcoins has gotten people harassed online. Not worth it.15:28
fluffyponygmaxwell: I quote your comment on Ripple criticism all the time15:29
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@gmaxwellfluffypony: which quote is that?15:29
fluffyponygmaxwell: https://www.reddit.com/r/tech/comments/3wgcrz/the_ethereum_computer_securing_your_identity_and/cxwdsd0?context=315:30
vega4I won't bother you here on this channel with an irrelevant subject as you say it is. @gmaxwell, I am not looking for criticism, I am a researcher and I see a lot of pointless criticism on forums suchs as Bitcointalks. I specialise in security cryptography I am looking for facts. For ex. from mathematical, security point of view why a given currency is considered a SCAM by some etc.15:31
katufluffypony: i like how you were eventually called out on monero, which has a rather less glamorous launch too :)15:32
@gmaxwellPlus the ~worse~ an altcoin is the stronger that rule generally applies. Like if an altcoin is pretty interesting but has some warts, perhaps some thoughtful people will give some (perhaps even constructive-) criticism.  If it's super scammy, then it's even boring to even look at ... and any interaction with it means interacting with scammy people, or worse-- getting scammy people mad at you.15:32
katuoh well, only altcoin should be criticizing altcoins.15:32
vega4the internal workings of Bitcoin are clear and solid to me, various altcoins such as DASH are not.. with their funny proof-of-being-connected to the network etc15:32
fluffyponykatu: "less glamorous" sure, but certainly not pre- or instamined by any measure (see the Monero section on https://archive.is/XCxc1)15:34
sipavega4: claiming that something is a scam requires you're convinced it's intentionally deceiving people15:34
sipavega4: that's often hard to say15:34
sipasome things may have been started by some people with genuine interest in experimenting with technology, and then pumped by others who are only in it for a quick money15:35
fluffyponyvega4: https://www.reddit.com/r/Bitcoin/comments/2zufu1/a_great_podcast_by_lets_talk_bitcoin_discussing/cpmvogy?context=315:36
CocoBTCWell, the _obvious_ scams OneCoin and Swisscoin (or what's it called), and PayCoin back in the days. Others are are just shady15:36
fluffyponythere, now we can stop talking about it15:36
@gmaxwellvega4: there are many layers to those questions-- for example a system could be sound technology; but have been created in a sketchy way by dishonest people trying just to enrich themselves.  Or, alternatively, it could be earnestly created but by unqualified parties and throughly unsound as a result (and a really bad thing to use).  or perhaps something could be good by both those measures but b15:36
@gmaxwelly accident of history many of the people promoting it are sketchy and use dishonest means.  Each of those cases is pretty different but people would call something a scam in each of them, with justification.15:36
katuCocoBTC: i'd refrain from calling particular names, because we'd never see end of the day. why not just talk in general, ie motivations of spawning useless clones, what to do about, if anything etc?15:37
fluffyponykatu: OneCoin isn't an altcoin.15:37
sipaif you're asking about the technology you're almost certainly not asking about the intentions with which it was created15:37
@gmaxwellsipa: English is complex like that though,  something can be "a scam" without there existing "a scammer"-- becuase "a scam" conventionally can also mean a really bad deal (-EV) deal.15:37
vega4@sipa that is right what you say that in some situations it might be diffcult to say whether something will deceive people in the end. That is why I am looking for technical possibilities, reasons which would even make it possible to deceive people in the end. As far as Bitcoin goes a 51% attack is the only thing I see. In altcoins where funny stuff such as proof-of-stake comes into play things are much less solid I would s15:38
vega4ay15:38
@gmaxwellI think the word's meaning has crept some because you can't really know people's motivations.15:38
kanzurevega4: you could read things like https://download.wpsoftware.net/bitcoin/pos.pdf https://download.wpsoftware.net/bitcoin/alts.pdf https://download.wpsoftware.net/bitcoin/asic-faq.pdf15:38
vega4thank you all for your links15:38
sipavega4: if you're talking about technical weaknesses, there are many15:38
CocoBTCkatu: fair enough15:39
sipabut that does not imply the technology is uninteresting or deceiving15:39
sipa(i personally am not interested in dash, but i also haven't studied it deeply to point at any)15:40
@gmaxwellvega4: there are many altcoins which are basically just impossible to analyize. They make a multitude of vague claims, without being precise enough to analyize or refute them, but it sounds good. Marketing pap, if you will.  That in and of itself is a kind of "meta-unsoundness"-- how can you say a system is reviewed if its presentation has made it unreviewable?  Maybe there is something of merit15:40
@gmaxwellburried there, but in the sea of meritless marketingcoins its not a good use of time for most people to look.15:40
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@gmaxwellDoubly so because of the fact that, as I've pointed out, being critial of these things-- even, sometimes, over minor fixable things can cause a really hostile response by unsavory advocates of some of the systems.15:40
fluffyponygmaxwell: they have a vested interest in hiding their failures, so nobody should trust any claims coming from within the system anyway15:41
katuin short, 90% of altcoins lack rigor to remove their opaqueness.15:41
@gmaxwell(This isn't unique to altcoins, though its much worse for some ... --- I've had bitcoin adhearents respond in threatening ways when I pointed out unsolved problems or limitations)15:41
fluffyponykatu: https://bitcoinmagazine.com/articles/are-any-altcoins-currenty-useful-no-says-monero-developer-riccardo-spagni-145874354615:41
sipamonero is one of the few that do actual research, and are honest about limitations imho15:42
@gmaxwellin other domains of intellectual inquiry it's less common for mobs of angry people to respond with such hostility to earnest analysis.  Not unheared of, especially in a few specially politicized areas... but uncommon.15:43
fluffyponysipa: and still people ignore us and overstate what Monero does :/15:43
katuits bound to happen, this is basically area of rabid penny stock marketing15:43
sipafluffypony: same with bitcoim :)15:43
@gmaxwellfluffypony: welcome to the club.15:43
sipa*coin15:43
katupenny stock marketers in the 90s were very aggresive too15:43
fluffyponylol15:43
@gmaxwellkatu: yea, I've pointed out to people that the only place I've seen so much bile as we have in cryptocurrency is on the yahoo stock forums in the late 90s.15:44
sipahow is babby formed?15:44
@gmaxwellSELL SELL SELL15:45
CocoBTCfluffypony: pro-monero people seems to be literally everywhere. It's weird15:45
fluffyponysipa: how girl get pragnent15:45
@gmaxwellfluffypony: the point I make to people is that inherently cryptocurrency has a strong scam vibe to most people. Being frank about limitations while being positive about the future makes many people much more confident in it. Though I can't say that I've really ever turned a foaming advocate of Bitcoin to someone using a more measured advocacy.15:46
fluffyponyCocoBTC: if any of them ever spew nonsense link me to it so I can tell them to slow their roll :-P15:47
katumonero is more or less nice, though i wish they were more transparent on their initial AES gambit15:47
sipaalso, there is rarely just one identifiable group behind an altcoin15:47
katunot really complaining as i wrote one of the private miners too15:47
sipathere are delopers, and advocates, and marketers, and an ecosystem15:47
@gmaxwellwell that was bytecoin's doing, not monero persay. :( pretty unfortunate.15:47
fluffyponykatu: that was out of our hands, I didn't even know Monero existed until 6 days after the launch15:48
fluffyponygmaxwell: yeah indeed15:48
fluffyponyclever scammers gonna scam15:48
kanzuregmaxwell: so in cryptosystem review, would it be helpful if there was a standard review format where people are asked to state their assumptions very explicitly (such as which of the 'standard' hardness assumptions they are using) in an explicit format? at least then reviewers could easily point out when there's format failure.   unfortunately i think this will fail for cryptosystems that require unusual details that break common ...15:48
kanzure... formatting choices. i guess, then, those should even be further highlighted, so perhaps this is a good idea.15:48
fluffyponyotoh at least we take some dark market / ransomware / etc. heat off Bitcoin ;)15:48
kanzureand by 'explicit format' i mean something that is one-glance gleanable15:48
sipai wonder whether anyone who isn't using oure pow can even answer that question15:49
sipa*pure15:49
kanzurei was thinking something like "once you can get people to agree about formatting, then you can do exponential backoff of reviewing updates to the same system, because otherwise reviewers are going to be denial-of-service attacked"15:50
kanzure*updates to the same scheme15:50
sipaproof-of-review15:50
fluffyponyproof-of-not-being-an-idiot15:50
fluffyponyPONBI15:51
@gmaxwellkanzure: https://github.com/bitcoin-core/secp256k1/issues/24215:51
CocoBTCfluffypony: not sure if that's really positive15:51
kanzurewell i mean, if you can get someone to cryptographically sign their review for some obviously broken thing, then you can at least use that as evidence that their reviews are worthless15:51
katuspeaking, of exotic proof-* ... has there been any serious proposal to eigentrust metric?15:51
@gmaxwellIt can get a little complicated when your system has a layered security assumption.15:51
fluffyponyCocoBTC: which bit?15:51
@gmaxwellkatu: I think there should be a meme image for "when your consensus system can become numerical unstable" :P15:51
katugmaxwell: :)15:52
CocoBTCif dark net people start using another cryptocurrency because bitcoin doesn't satisfy15:52
kanzuregmaxwell: that's a good start. i definitely agree that these things should be more explicitly documented.15:52
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@gmaxwellE.g. I think Bitcoin's security assumption is best described in a layered way, where you talk about a majority hashpower strictly protocol following ('honest'), and it has some properties in that model... and then you can talk about a 2/3 rational 1/3rd honest, and what that looks like.. including the shape of what rational behavior based on the payoff matrix for defecting.15:53
kanzuregmaxwell: specifically my "formatted cryptosystem review-request" idea above is a way to make it possibly worthwhile to do review in public, specifically the value is that it will be possible to accumulate evidence of terrible reviewers and evidence of dubious security writeups and/or rapid design churn15:53
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kanzurenot sure what to do about layering. i was actually thinking of more simple cryptograhpic primitives as a starting point.15:54
fluffyponyCocoBTC: I dunno, I think it forces reporters to reconsider whether "privacy enhancing thing X" is inherently bad just because it *can* be used for "criminal activity Y"15:54
@gmaxwellAnd the layering is really hard for people to deal with, I've encountered people with proposals which they say are _identical_ in security to bitcoin, except they're only working with the strongest supermajority honest assumption, and what they propose is totally brittle, having no security at all outside of the honest majority model. Thats not the same as Bitcoin.15:54
kanzureand a lot of bitcoin security status partly relates to the bootstrapping phase (in weird intertangly ways)15:55
@gmaxwellkanzure: sure, plain crypto primitives are easier to do this for, in part because if they had security as weak as what we're stuck with for consensus, they'd be discarded. :)15:55
@gmaxwell(unless they're multilinear maps, people seem to not do a good job discarding those systems. :P )15:55
kanzurewell i mean, look at the marketing for the altcoins and such, i'm sure someone will eventually start applying pressure like that on primitives. so even there it would be good to accumulate signatures of terrible reviewers endorsing stupid shit.15:56
katugmaxwell: why i'm asking about eigen, tor people had an initial stab at it, but basically can't go beyond current state of eigenspeed as outlined in https://www.usenix.org/legacy/event/iptps09/tech/full_papers/snader/snader.pdf15:56
katunumerical instability as such is not really a problem, as tor will probably never become actually decentralized (ie fatal fault mode would be fixed by centrally issued checkpoint)15:57
CocoBTCfluffypony: sure, good point.15:57
katuthere's even some mock implementation of it https://trac.torproject.org/projects/tor/ticket/5464 ... just trying to picture what an actual p2p consensus would look like15:59
kanzureit would also be useful to ask people for a specific hash of their writeup (or code, sigh) before doing review. hash could be timestamped in public. then, you can show that the flurry of updates should disqualify the design from being considered ready for review -- plus, there can be an actual set of content that is being explicitly reviewed. it would be a good precedent to establish.15:59
kanzureso while the negative impact of doing public criticism is a bunch of online harassment, the positive benefit is the collection of signatures for dumb broken proposals16:01
kanzure(er, of course, it's possible to sign a review saying something looks somewhat secure, and in the future the cryptosystem may no longer be secure.  it might not be uncommon to find a bunch of broken security assumptions that were heavily reviewed as 'good idea' at the time in ancient past....)16:02
katukanzure: invisible hand to the rescue. make altcoins a reputation market, with futures and bonds.16:03
@gmaxwellkatu: likely it wouldn't... in all these systems if you have open admissions (required for true decenteralization) the attacker can almost always behave strategically to eclipse the honest participants. Or, consider the alternative, many actual users could join and _couldn't_ override misbehavior of the initial set there, so it would be a dictatorship.  Bitcoin isn't free of that kind of failure,16:04
@gmaxwell but at least we can more or less clearly describe what tradeoff its actually making.16:04
* gmaxwell vomits all over 'reputation market' ... lemon market.16:04
katuwell, target demographic is rabid speculators anyhow; so what difference it makes to them16:04
@gmaxwellin #bitcoin-otc ... one of the larger expirements in meaningful online reputation, highly positive rank in the reputation system is positively correlated with scamming rather than negative.16:05
kanzurethese are all lemon markets anyway. aren't they?16:05
@gmaxwellbecause scammers work the system, while honest people don't have much to gain by jucing their stats (they're making fair trades after all), and participate in much less vigorous way.16:06
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katugmaxwell: yea, though i take research based on advogato data as more fitting. it is definitely possible to scam your way to the top, but it takes a lot of effort to beat pagerank.16:06
sipamy first rating on bitcoin-otc was for "nice graphs"16:06
katuincidentally, that is related to eigentrust too16:06
katueclipsing edges and clique detection16:07
@gmaxwellkatu: advogato rakings lead to bad conclusions, you gained nothing much by high advogato marks.  Dishonest use was largely a waste of time behind vanity.16:07
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@gmaxwellBasically if you measure reputation in contexts where reputation doesn't matter much, you learn little to nothing about the exceptional cases that attackers can drive the systems into... similar to niche altcoins -- "hasn't been attacked yet" isn't much of a security metric.16:08
katugmaxwell: indeed, definitely a lot less of profit motive and more ... trolling motive? :)16:08
kanzurewhat16:09
kanzurekatu are you a bot16:09
@gmaxwellkatu: sure you can have mechnical clique detection (and the tools around otc help people see cliques) -- but attackers just adapt. They don't just form self rating cliques, they make a new identity, make a pile of real at-par trades using that identity.. it's as real as anyone else.  Then they start scamming.16:10
kanzurekatu: (the reason i ask is because your responses don't seem to update based on recent past input)16:10
katukanzure: parsing irony is a hard AGI problem, perhaps you could be more descriptive16:13
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kanzurethere is a bug (not irony) somewhere here and i'm not sure how to suss it out, but i'll offer that "profit/trolling" motives don't seem related to .. oh maybe you are talking about eigentrusters.16:17
@gmaxwellno, talking about advogato.16:18
@gmaxwellno real profit motive to juice the stats, but perhaps trolling motive.16:18
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vega4I must say that I feel astounded and perplexed after seeing part of the 'discussion' which was handed to me at https://www.reddit.com/r/Bitcoin/comments/2zufu1/a_great_podcast_by_lets_talk_bitcoin_discussing/cpmvogy?context=3     ;  the guy named fluffyponyza, a dev behind  monero seems rational he asked for a mathematical proof and was confronted with pure chaos in response16:48
kanzurewelcome to the abyss.16:49
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bsm1175321There's an agency in every major country tasked with regulating these kinds of scams.  They happened long before the crypto era.  In the US it's called the Howey test -- basically if the buyer doesn't have control over whether he makes money with the asset, then it's a security, and subject to regulation.  The question to ask of any new coin is: does it satisfy the Howey test; are the creators profiting off it; ha16:53
bsm1175321http://consumer.findlaw.com/securities-law/what-is-the-howey-test.html16:53
bsm1175321If the creators can't be even bothered to know whether they're legal or not...well...caveat emptor.16:55
kanzureyou are experiencing message cutoff16:55
bsm1175321The question to ask of any new coin is: does it satisfy the Howey test; are the creators profiting off it; have the creators applied to the appropriate regulatory body?16:56
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bsm1175321Creating an asset, selling it (caveat emptor) and profiting off it is *illegal* unless done under the correct regulatory framework, and for good reason.17:00
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bsm1175321Back to the topic at hand...I was just watching a talk about IOHK's work on proof of stake. https://www.youtube.com/watch?v=JTsL_8mhH1g17:06
bsm1175321He claims that the Lamport 3f+1 result is synonymous with asynchronicity.  I don't think that's true...17:07
bsm1175321(Relevant because a braid is an asynchronous blockchain)17:07
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katubsm1175321: is there a paper for this somewhere?17:17
bsm1175321katu: Not that I know of.  I know, I can't be bothered with videos either.17:17
katui just skipped through, but have hard time understading what kind of bond/commitment this actually is. i know that vitalik tried to propose various punishing schemes (for competing forks and such), is this one of those?17:19
bsm1175321It's just Pedersen commitment, as I understood17:21
katubsm1175321: yes, he does explain pedersen commitments for first 20 minutes i skipped through. i mean 24m onwards.17:25
bsm1175321That's where I got lost.  I twittered Charles to link the other half.17:25
bsm1175321https://twitter.com/IOHK_Charles/status/77367499569627955317:26
bsm1175321two days, he says17:26
bsm1175321I do think he probably has a workable idea, but I also think that any PoS system only works with a PoW bootstrap, and if you dispense with the PoW, then it's a zero sum game and results in monopoly control, at which point profit maximization fails.  A PoS/PoW hybrid can mitigate attacks for large miners having < 51%, as has been shown by others.17:29
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katubsm1175321: to me, costless simulation is a dark dungeon full of traps and circular logic17:58
katuthere are crutches to solve some of its problems, of course, like piggybacking NUMS timestamps from other PoW chain, thus making the altchain dependent on it. but even then.18:00
@gmaxwellif you've already got a consensus then having a consensus is easy. what a surprise.18:07
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bsm1175321Yep.18:23
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midnightmagic:-D19:09
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TaekThe 2015 paper "On Scaling Decentralized Blockchains" showed that block propagation time was linear with block size for sufficiently large blocks22:30
Taek(about 80kb iirc)22:31
Taekand that the 90% nodes were able to do about 55Kbps throughput22:31
Taekdoes anybody know if these numbers have gotten better, or what the characteristics of the 10% slow nodes were that made them so slow?22:31
Taekthe 50% was >400Kbps, which is obviously a whole lot better22:31
Taek"Moreover, due to lack of pipelining, propagation over multiple overlay22:36
Taekhops introduce delay proportional to the length of the path."22:36
TaekI guess I was misreading the throughput22:36
TaekIf the paper is suggesting that pipelining could increase the throughput, that means that the slow nodes in their analysis were not downloading blocks the whole time22:37
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PeterRTaek: if the experiment were repeated with Xthin-enabled (or CB-enabled) nodes, the "throughput measure" would be significantly better.23:07
PeterRFor example, we found that Xthin blocks propagated 5.6X as fast across the normal P2P network, and 9.7X as fast thru the GFC, so I'd expect a corresponding increase in "throughput" as defined by the Cornell paper.23:10
PeterRhttps://medium.com/@peter_r/towards-massive-on-chain-scaling-block-propagation-results-with-xthin-5145c9648426#.8lmocolkf23:10
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TaekPeterR: were your experiments performed on a 6000 node network, and does 5.6X as fast apply to the 90 percentile?23:23
Taeke.g., were the slowest 10% of nodes also seeing speedups of 5.6X?23:23
TaekThough I only skimmed it, I don't think your analysis hits nearly the depth that I'm looking for23:24
PeterRYes, our experiments were performed on main-net over 8000 blocks.23:24
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PeterRIt probably doesn't hit the depth you're looking for.  We're only comparing single-hop propagation times between Xthin and standard block propagation.  The Cornell paper is looking at propagation across the entire network.23:25
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PeterRBut clearly improving single-hop times improves network wide propagation times, ceteris paribus.23:26
PeterRI'd love to see a new test on a large number of nodes, where all the nodes support Xthin (or CB).23:28
PeterRWould be interesting to see the improvements over a large node population (rather then just over a large block population).23:36
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Taekso, hopefully I'm not reading this wrong, but the paper states that throughput begins to dominate latency at a block size of about 80kb, at which point the throughput is 55Kbps23:39
Taekwhich means that the latency for an 80kb block is about 1.5s total23:39
TaekThat number is important to my Scaling Bitcoin proposal, and if it really is that low, it makes my life a lot easier23:40
PeterRRight.  Latency dominates for smaller blocks.23:40
Taekespecially b/c it seems like Tor only adds a few seconds of latency23:40
Taek(my proposal is essentially to reduce the blocktime to 1 second)23:40
Taeksecurity is pretty easy to achieve, but at the cost of a high confirmation time23:41
Taeklike, 30 minutes23:41
PeterRIt's something like time = latency + k * blocksize23:41
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PeterRWhat is the advantage of increasing the confirmation time to 30 min?23:42
Taekwell, requires a lot more context23:42
Taekbut basically there's a system I'm working that's braids based23:42
PeterRI think braids has a lot potential.23:43
Taekand, as long as an attacker can't reasonably mine X blocks in a row, there will be no orphans on the network period23:43
TaekSimulations are suggesting that X needs to be around 600.23:43
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PeterRGotcha.23:43
TaekIf you bring the blocktime down to 1 second though, to keep pace with the 4MB throughput you end up with blocks that are 6kb each23:44
Taekone huge advantage here though is that throughput is constant instead of bursty23:45
Taekso you get this great pipelining that you just can't do in standard satoshi style consensus23:45
Taekwhich means that you can potentially push the ratelimit up from 4MB. The paper doesn't really go into enough detail though to suggest what sorts of gains you get from pipelining23:46
PeterRHave you talked to Bob about how he did his modelling?23:46
Taeknot in-depth yet23:47
Taekthe SB deadline has pushed me  to actually put together proper proofs ha23:47
Taekuntil now I haven't really been that rigorous, been happy to handwave23:47
PeterRGood!  That's what deadlines are great for.23:47
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PeterRWe've submitted a proposal to present more test results for Xthin, and I'm trying to finish a proposal to present on subchains.23:48
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PeterRRegarding rigorous proofs, Bob was explaining a proof he made regarding the expectation value between confirmations in a Braid.23:51
PeterRUgh....it seemed quite profound at the time--like it would apply more generally than just to Briads--but I forget the essence of it now.23:52
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