dlubarov

44 ms·

601.
by dlubarov 6y ago
Yeah -- I assumed that a random hex password was chosen, and that the attacker does a brute force hex search (e.g. JtR with Incremental:LowerNum). Granted, in practice the attacker usually doesn't know the exact format, so they might w
602.
by dlubarov 6y ago
Bitcoin miners are doing around 170 quintillion hashes per second, so if all of those resources were put toward cracking these passwords, in theory it should take around 20 billion years for the longer one [1], or about 38 milliseconds for
603.
by dlubarov 6y ago
I would say grinding is a solved problem. We have practical constructions of verifiable delay functions now, e.g. [1] or [2]. (For anyone not familiar with VDFs or how they fit in with , I would recommend one of Dan Boneh's talks, like
604.
by dlubarov 6y ago
It seems like your contention is that PoS coins are priced based on discounted cash flow, correct? I think that's a reasonable model, but it's hardly unique to PoS coins, and it doesn't really seem problematic. > the syste
605.
by dlubarov 6y ago
As someone who works on ZKPs, that's very doable :) In a Zcash-style spend circuit, the bottleneck is typically the Merkle inclusion proof, which takes say 32 hashes (assuming a limit of 2^32 note commitments). If we're comfortabl
606.
by dlubarov 6y ago
Can you be more specific about the differences your talking about? As far as I'm aware, Google never added their own features to the language itself. Granted, they were a bit slow to support new versions like Java 8. They also chose no
607.
by dlubarov 6y ago
> I’d be willing to buy gold or art at a certain price for their practical or esthetical use For esthetical use, wouldn't an inexpensive fake gold work just as well, as long as its appearance was substantially the same? Not many peo
608.
by dlubarov 6y ago
I don't understand how this viewpoint can persist now that we have quite a few PoS chains humming along in production: Cosmos, Tezos, Polkadot, Mina, Solana, Avalanche, Cardano, Eth2. Edit: I suppose what you said is a fair statement;
609.
by dlubarov 6y ago
Would you agree that attacking Eth2's consensus requires a certain percentage [1] of total voting power? If so, then by extension, it requires a certain (somewhat different) percentage of the total Eth supply. > The exchange rate fr
610.
by dlubarov 6y ago
> The thing that matters is how valuable the 32ETH stake the validators put up is as that is the amount of penalty for trying any attack. Well, there wouldn't be much point in attempting an attack if the attacker didn't have th
611.
by dlubarov 6y ago
That title might be misleading; the doc is just about generating transactions without the sender and recipient needing to engage in an interactive protocol. It doesn't address double spending.
612.
by dlubarov 6y ago
True for now, but there's a limited and ever-decreasing supply of older cars without rear-view cameras, small homes without HVAC, etc. Today it's hard to buy a car (in decent shape) without airbags; I expect that in 20 years it wi
613.
by dlubarov 6y ago
It seems like an implicit premise in that line of reasoning is that consumers have a choice: they can increase their spending if they want a quality upgrade, or they can forgo the upgrade and keep their spending relatively constant. In some
614.
by dlubarov 6y ago
Their arguments seem to be 1) Eth2 has been "coming soon" for a long time, so it will never happen. (Yes progress has been slow, but it's happening, with phase 0 live now.) 2a) In PoS, the rich get richer. (Not true in a mean
615.
by dlubarov 6y ago
As an example, it would benefit Spotify iOS users if the app could say "FYI, we charge $13/mo on iOS to offset Apple's cut, but you can subscribe for $10/mo on our website if you prefer."
616.
by dlubarov 6y ago
> broader money supply hasn't really changed much Did you zoom out? M2 money supply increased 25.6% in the past year. Might be easier to see at https://fred.stlouisfed.org/series/M2
617.
by dlubarov 6y ago
To me Mina and Zcash are interesting since they (plan to) use cryptographic arguments to show that chain states are valid, which leads to some nice features, such as better light clients. I'm probably biased since our own startup was i
618.
by dlubarov 6y ago
Plus Cosmos, Polkadot, Solana, Cardano, Avalanche, NXT, and probably others I'm forgetting. There are plenty of PoS systems in production these days!
619.
by dlubarov 6y ago
Eth2's design supports staking pools though, so it just takes ~$20 to participate, depending on the pool. Granted, some of the staking rewards go to the node operator, but it's a competitive market, so the difference should be com
620.
by dlubarov 6y ago
Well, it's still fair in the sense that everyone has access to the same rate of return, if they choose to stake. (And in some modern PoS designs, staking nodes can be run with very little resources.) Consider a hypothetical blockchain
621.
by dlubarov 6y ago
> That’s a very privileged view > I doubly you will read it Why do you feel the need to use ad hominems rather than simply making your point? > Research by the WMF in 2019 shows incredibly low rates of awareness in large parts of t
622.
by dlubarov 6y ago
Maybe my wording was a bit strong, but the US is a pretty small minority of Wikipedia's usage. If we look at article counts, about 12% of articles are in English (5.8M of 49.3M): https://stats.wikimedia.org/EN/Tabl
623.
by dlubarov 6y ago
Eh, Wikipedia is 20 years old, and has been a top 20 site for the past 15 years. At this point, they don't have much serious competition. Britannica stopped printing physical encyclopedias in 2012. The WMF can certainly make their case
624.
by dlubarov 6y ago
I think the problematic scenario is when the customer wants to buy a security using the proceeds of a recent sale, which hasn't settled yet. Since the proceeds haven't made it to the broker's bank account yet, the broker woul
625.
by dlubarov 6y ago
Thanks for the background info. Why can't the database be updated ~instantly though? Is it just because of legacy systems that handle settlement in periodic (daily?) batches? Also, couldn't a broker eliminate this risk by just mak
626.
by dlubarov 6y ago
Is there reason to think that velocity will remain low in the long term, though? If it's just temporary economic effects caused by COVID (e.g. less physical commerce), then surely we will see higher inflation as those effects go away?
627.
by dlubarov 6y ago
Layer 2 protocols are just those that operate "on top of" a base protocol, such as Lightning Network (on top of Bitcoin), roll_up (on top of Ethereum), or POA Network (also Ethereum). (I would argue that the terms are imprecise th
628.
by dlubarov 6y ago
We can talk about those things without the language of calculus, though: "this graph shows requests per second, and that graph shows cumulative requests." And I think it should be clear how to derive one graph from the other, with
629.
by dlubarov 6y ago
> most cryptocurrencies haven't adopted PoS despite it facially seeming better/"less wasteful" Most post-launch cryptocurrencies were designed a long time ago, though. If you look at recent credible projects, most inv
630.
by dlubarov 6y ago
That's accurate, although Eth 2 is planning to use fairly small shards (128 nodes according to the current spec). So there should be ~128 nodes redoing each computation, vs several thousand in Eth 1. Some newer projects (including the

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