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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<gmaxwell>
OT] this not-bitcoin-related mystery hunt puzzle from this year might be fun for some people here: http://solutions.monsters-et-manus.com/hunt/puzzle/great_tits.html (mystery hunt solutions are words or short phrases, almost always all alphabetic. The solution link there is a total spoiler that gives not just the answer but how it was found; the puzzle is moderately hard so if you're going to tr
<gmaxwell>
y don't give up easily and just hit solution)
<gmaxwell>
(well not very hard by mystery hunt standards, or I wouldn't bother linking it here))
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<Fibonacci>
Your personality is about as charming as your face. Ive done nothing offensive until now. Go ahead and kick me.
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<mmeijeri>
@bluematt: where did you get this version of wirehair? it appears to be newer than the one I'm seeing in the wirehair repo
<BlueMatt>
mmeijeri: you're looking for wh256
<mmeijeri>
ah, those are not the same thing?
<BlueMatt>
wh256 is, indeed, a newer version, with some new features
<mmeijeri>
cool
<mmeijeri>
this catid guy has a lot of cool stuff in his repos
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<sipa>
FibonacciCoin: you're not being offensive, you're just off topic
<sipa>
but please cooperate
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<petertodd>
bsm1175321: that's correct: there's nothing stopping them. OTOH, it's trivial to mirror OpenTimestamps calendars. Or at least, it will be once I write some more code to make it possible.
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<petertodd>
bsm1175321: I'm perfectly happy for OpenTimestamps to be a semi-trusted centralized system given the low risks involved.
<petertodd>
bsm1175321: Much easier than putting in the massive amount of engineering effort need to make it decentralized, particularly when it's not clear that such work would result in a system that in practice was all that much more reliable.
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<yoleaux>
[1612.05491] Strong Federations: An Interoperable Blockchain Solution to Centralized Third Party Risks
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<kanzure>
andytoshi: typo "Existing proposals to form consensus for BItcoin-like"
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<Chris_Stewart_5>
On page 4 of the 'strong federation' paper it says "If the majority of Watchmen remain
<Chris_Stewart_5>
secure, the value held by the sidechain cannot be redeemed
<Chris_Stewart_5>
on the parent blockchain
<Chris_Stewart_5>
shouldn't 'cannot' -> 'can'?
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<instagibbs>
Chris_Stewart_5, I believe this is saying funds can't be *stolen*, as it acts as a multisig wallet
<instagibbs>
so whatever number of watchmen you require to peg out funds, which can be arbitrarily high, with a risk of pegouts halting due to failure(which leads to Backup Withdrawal if long enough))
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<stevenroose>
Chris_Stewart_5, yeah, I interpreted it as "the value on held by the sidechain cannot be redeemed on the parent blockchain [by the attacker]"
<Chris_Stewart_5>
stevenroose: Definitely agree if the [by the attacker] part is added it makes it seem less ambigous
<Chris_Stewart_5>
because, if the majority of watchmen remain secure, you should always be able to redeem your bitcoin from the sidechain
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<yoleaux>
[1701.04439] Dandelion: Redesigning the Bitcoin Network for Anonymity
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<bsm117532>
This appears to be about the anonymity of *nodes* not fungibility
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<othe>
yes its a p2p stack improvement, not sure it does add any value that tor/i2p wouldnt add
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<bsm117532>
There is an advance to be had there that improve on i2p/tor...using mixnets.
<gmaxwell>
kanzure: thats great! it sounds like it's vaguely related to the propagation design I was proposing https://bitcointalk.org/index.php?topic=1377345.0 ("One possible scheme [...]") though my focus was on communication efficiency; but one of the challenges was figuring out how to analyize it.
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<instagibbs>
AFAICT the paper is assuming malicious nodes are following the rules, "honest-but-curious", although they suggest some future work to mitigate
<petertodd>
would someone mind getting me a copy of 55dcfebff45d7e4f9970edd053c87cb0b659e459f4f6360d4a2c17837e79410 and a736822a4f518eb137658030f1e11a804d64d1da48c195222f604aaf2df908e from testnet?
<petertodd>
I don't know of any tbtc block explorers that have raw hex output
<sipa_>
petertodd: are those txn or blocks?
<petertodd>
sipa_: txn
<petertodd>
sipa_: blocks would have more zeros :)
<sipa_>
parameter 1 must be hexadecimal string (not 'a736822a4f518eb137658030f1e11a804d64d1da48c195222f604aaf2df908e')
<gmaxwell>
wtf
<gmaxwell>
parameter 1 must be hexadecimal string (not '55dcfebff45d7e4f9970edd053c87cb0b659e459f4f6360d4a2c17837e79410')
<bsm117532>
I don't understand how anyone lives without txindex :-P
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<sipa_>
bsm117532: :(
<sipa_>
that's the saddest thing i've heard in a while
<bsm117532>
Hahaaa why?
<gmaxwell>
because it craps on performance and scalablity.
<sipa_>
if everyone needs a fully indexed unprunable bitcoin node, all our scalability attempts are worthless
<bsm117532>
Having to scan the blockchain linearly craps on performance of apps.
<sipa_>
so build applications that don't need to access old forgotten transactions
<bsm117532>
I explicitly need that.
<sipa_>
except if you're building a block explorer like site, i don't see any use case for them
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<sipa_>
or analysis things
<gmaxwell>
bsm117532: if you're having to scan the chain then you're totally incompatible with pruning... not a long term viable configuration; anything that depends on txindex will be forced to use bc.i like third party trusted APIs N years from now, where N depends on particulars of the system growth and user's tolerance for costs.
<bsm117532>
Agreed wallet-like applications can/should dump old data.
<bsm117532>
gmaxwell: I accept that compromise. Further I can't prune witness data either.
<sipa_>
i'm not sure i want to know what you're doing then :)
<bsm117532>
I'm re-using your old (spent) bitcoin keys for other purposes.
<bsm117532>
(namely, identity)
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<sipa_>
well, good luck
<bsm117532>
Heh
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