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2441  Bitcoin / Development & Technical Discussion / Re: Quantum computing and Bitcoin's use of ECDSA on: March 14, 2018, 10:52:46 PM
1) Aside from the specific case of Pay-to-IP in earlier versions, is the above correct?
Yes (aside from the estimates; it's hard to predict the future).

2) What is the general plan when ECDSA is broken? Hard fork to a new signature algorithm?
Yes.

Thanks. I guess since this threat is sort of existential to the protocol that the fork would be non-contentious. Is there any consensus about what algorithm might be chosen?

I doubt a hard fork would be needed. I assume this can be done with a soft fork.

I assume we can add new rules requiring signatures to conform to a new signature algorithm. But without a hard fork, wouldn't we also still need to enforce use of ECDSA?
2442  Bitcoin / Development & Technical Discussion / Quantum computing and Bitcoin's use of ECDSA on: March 13, 2018, 08:49:30 PM
I came across an interesting article by nopara73 (who works on HiddenWallet and TumbleBit stuff). He discusses when quantum computing will break elliptic curves:

Quote
Quote
The elliptic curve signature scheme used by Bitcoin is much more at risk, and could be completely broken by a quantum computer as early as 2027, by the most optimistic estimates.
The paper estimates the breakthrough to 2027 with a completely different method. I tend to think 2022–23 are the right numbers...

Quote
For Bulletproofs, what matters is the Shor RSA2048 line, which is predicted to be broken in 2022–23.

He concludes that since we don't expose Bitcoin public keys when transacting (only hashes of public keys), that our bitcoins are safe. That is:
Quote
Thus, as long as you don’t expose your public key, you don’t need to worry about quantum computers and the only way to expose your public key is to make a Bitcoin transaction. If you don’t reuse addresses you are quantum safe.

So, I have two questions.

1) Aside from the specific case of Pay-to-IP in earlier versions, is the above correct?
2) What is the general plan when ECDSA is broken? Hard fork to a new signature algorithm? Simply never reuse addresses?
2443  Bitcoin / Bitcoin Discussion / Re: Are you in support of paying your taxes in Bitcoin? on: March 13, 2018, 08:25:22 PM
After all, this is the money used to fund your school system, hospitals, pensions, police, fire, and all other government services. It sounds awfully risky to rely on something with such volatile price to provide for needs that are so important to the community.

Accepting payment doesn't necessitate hodling. Maybe they could hook up with a licensed payment processor like Coinbase.

Eventually, BTC might be held in government reserves just like other hedging assets -- gold, etc. It's rational to be skeptical now, but don't ignore the trends. Gold also rallied over 600% in a decade (early 2000s). It's volatile but is still considered a value hedge.

but is this another way the government is trying to take all our bitcoin?

Yes. It's also a privacy hole. Payments provably linked to a taxpayer ID can have implications for de-anonymizing your wallets.
2444  Bitcoin / Bitcoin Discussion / Re: Are you in support of paying your taxes in Bitcoin? on: March 12, 2018, 11:14:21 PM
But do you think paying your taxes in Bitcoin will be a good thing for Bitcoin?

Sure, it's a good thing for establishing legitimacy. What better endorsement could there be than government acceptance? It would mean that mainstream acceptance is inevitable. That's a giant leap from 5 years ago when mainstream opinion said that BTC was only for drug dealers and criminals.

Or is it another way the government is trying to take our Bitcoin?

It's definitely a way for governments to take our coins. I would never pay my taxes in BTC, just like I would never sell after a prolonged downtrend. Both Wall Street and governments want your coins cheap. Don't give it to them.
2445  Bitcoin / Bitcoin Discussion / Re: How to protect your bitcoin online wallet from hackers on: March 12, 2018, 10:57:59 PM
Always use strong VPN that'll encrypt your connection when accessing your bitcoin wallet.

VPN privacy is overrated. You're tunneling your private data over an insecure medium. And then you're trusting the VPN not to snoop on your data (or to keep IP logs on you). Most of your holdings should be in cold storage (VPN should be irrelevant). Even your spending wallet can be on an air-gapped computer, where you push only signed transactions from an online machine. You can use TOR to do so for privacy purposes.

Always enable the 2FA in your bitcoin wallet and use Google Authenticator to secure your wallet

Only for an online wallet or third party signing setup (as the title implies). In practice, I recommend against both. I much prefer an offline signing environment. Multisig can be used for additional security.
2446  Bitcoin / Legal / Re: Are You Afraid of KYC? on: March 12, 2018, 10:19:55 PM
I can see that soon almost exchanges and even ICO programs will be requiring us to do the KYC procedures where we are required to pass copies of our legal documents before we are granted entrance or the use of the services or programs we are interested with. This can be as common as having a password or 2FA.

Not necessarily. My impression is that exchanges (as well as ICO operators) are mainly concerned about major world superpowers like the US and China -- emphasis on the US. Who else has actually shut down exchanges for noncompliance, or come after ICOs for securities violations? The EU is all bark and no bite.

As expected, over the last couple years, several exchanges have started either barring US residents entirely or otherwise requiring strict KYC. This is the new dichotomy. On one side, KYC is not enforced and VPN/TOR can be used to circumvent prohibitions. On the other side, KYC is mandatory (e.g. where US residents are explicitly allowed).

Now, personally I have no big problem with it though just like anybody else am also concerned that my personal information can be divulged to anybody or a group that might use it for any illegal purpose. This is one risk we are facing once we are actively living in the online world. Evil people who can be thousands of miles away can now be just one click away.

I'm extremely paranoid about my documents getting into the wrong hands. As a general rule, I avoid ICOs that require KYC (but I generally avoid ICOs anyway and focus on trading after launch). You can always use decentralized exchanges to trade tokens without KYC.

Eventually, trusted identity services (maybe Civic and others) will emerge and will act like credit reporting agencies for identity verification. This is better than every ICO doing their own KYC, but it still requires centralized PII storage, which is fundamentally dangerous for us.
2447  Other / Beginners & Help / Re: EXMO withdraw problems on: March 11, 2018, 09:43:38 PM
Hello, I have withdrawn bitcoin from EXMO, it shows that it is paid but, I don't have txid, and on bitcoin wallet address where I send funds didn't show my transaction, what can I do can you guys help me?

EXMO should provide a transaction hash in your history. If not, there may be an error or delay on their end.

Check your withdrawal address on a block explorer and make sure your wallet is synced. If you still haven't received it within a couple hours, I would definitely open a support ticket and explain the situation:

https://exmo.com/en/support
support@exmo.com
2448  Bitcoin / Bitcoin Discussion / Re: Kobayashi and his malicious sellout 400 million USD on: March 10, 2018, 09:37:12 AM
He probably doesn't have to consider that in a vacuum, no.

But it was irrational to dump high volume tranches into spot markets -- especially all at once, like he did -- since he obviously planned to sell additional tranches in the future. That's economic suicide in such a low liquidity environment as BTC markets. Even if selling on exchange markets was rational, he should have used iceberg orders over much longer periods of time. Dumping on spot markets at these volumes = significant slippage, which certainly wouldn't net the best possible price for creditors. He failed the creditors in both logic and practice.

The trustee obviously doesn't have experience as a fund manager, so I'm bewildered as to why he explicitly ignored the advice of multiple interested parties (Jesse Powell and Mark Karpeles to name a couple).

I'm still waiting to get a bit more information on this. He said he sold via exchanges but, for example, Bitfinex offers OTC services for large trades. He may well have used that and/or icebergs we really don't know. Most of the analysis I've seen claiming to identify drops caused by his dumping would have resulted in a much higher average price than the 10k he actually got. I'm taking a lot of what has been published about this with a pinch of salt.

Fair enough, I agree we don't have all the information here. The report isn't explicit at all. I guess I just assumed that if he were selling OTC that he wouldn't mention exchanges. The blockchain movements and Jesse Powell phrasing it literally as dumping on exchanges isn't enough to jump to conclusions. Maybe we're jumping the gun.

About the average price -- looks like the biggest tranche sold (by far) was moved near the very bottom at $6,000.

I'll say this. From reading the report and Q&A, I get the feeling this guy gets a kick out of dumping on us. Cheesy
2449  Bitcoin / Bitcoin Discussion / Re: Kobayashi and his malicious sellout 400 million USD on: March 10, 2018, 08:19:34 AM
I believe his job is to get the best price possible to reimburse those that lost out in the bankruptcy. If he didn't do that he would he would be negligent and get fired. His job description doesn't include any consideration to what effect that has on Bitcoin.

He probably doesn't have to consider that in a vacuum, no.

But it was irrational to dump high volume tranches into spot markets -- especially all at once, like he did -- since he obviously planned to sell additional tranches in the future. That's economic suicide in such a low liquidity environment as BTC markets. Even if selling on exchange markets was rational, he should have used iceberg orders over much longer periods of time. Dumping on spot markets at these volumes = significant slippage, which certainly wouldn't net the best possible price for creditors. He failed the creditors in both logic and practice.

The trustee obviously doesn't have experience as a fund manager, so I'm bewildered as to why he explicitly ignored the advice of multiple interested parties (Jesse Powell and Mark Karpeles to name a couple).
2450  Other / Meta / Re: Merittalk.org - New Board Request on: March 09, 2018, 12:59:39 AM
Give it some time and most of those posts will be gone to later pages, it's just that merit is still a new thing and, of course, there will be a discussion about it. No need to bother with merging or creating something like a new board, it would die out within a couple of weeks or month.
1 month later...

It will fade within 3 months, 1 month after is nothing here. Also, you can check what type of members are opening topics about it, it will give you a better idea.

That's why I don't think it's going to fade away. I think older members have had their fill -- there's nothing left to say on the topic. That's true.

But so many newbies on this site only arrived here because of bounty campaigns. Newbies and bounty spammers aren't going to stop making threads about it, and either lobbying for changes or fishing for merit in their OPs. And they treat the existing threads like any other spam megathreads. It's an eyesore and they're incentivized to keep posting about it because they got penalized by the system.
2451  Bitcoin / Bitcoin Discussion / Re: Homeless use Bitcoin on: March 09, 2018, 12:34:51 AM
I just hope they manage to hold onto some, rather than immediately spending it all. Smiley

At least in my country homeless people can not afford Internet access devices. This picture is good, but I do not know how real it is. I hope it is real.  Huh

It's becoming more and more common in the US, and probably elsewhere too. Just do a Google image search for "homeless bitcoin." I even saw a homeless guy with a QR code for ETH in my hometown the other day.

Low-income and homeless people can get free smartphones very easily here. Sometimes free data as well, but if not, free WI-FI access is everywhere -- cafes, stores, restaurants.
2452  Bitcoin / Bitcoin Discussion / Re: Crypto-currencies issued by the States. How will they affect bitcoin? on: March 09, 2018, 12:23:39 AM
They won't much, I suppose, as they are shitty-fiat currencies.

Do you think laypeople understand this? I don't.

There's been a lot of conflation among "digital currencies", "virtual currencies" and "cryptocurrencies." Most dumbed-down explanations and media coverage emphasize the intangible and virtual nature of coins and their lack of backing, rather than conveying why the technology works and why it has economic value.

I think people who know a little bit about why bitcoin was created, and its features, like decentralization and 21 million cap, don't care about state cryptos.

I agree with that. But I also think most people are plebs who don't know what decentralization is or why a deflationary supply matters.

To address the OP: States will issue digital currencies to take the luster away from real cryptocurrencies. They'll exploit ignorance about the technology to get people to ignore decentralized coins. To some extent, they will succeed, but there's no way they can actually stop the Bitcoin train. Legit cryptocurrencies will continue to flourish.
2453  Other / Meta / Re: Merittalk.org - New Board Request on: March 08, 2018, 11:31:33 PM
Give it some time and most of those posts will be gone to later pages, it's just that merit is still a new thing and, of course, there will be a discussion about it. No need to bother with merging or creating something like a new board, it would die out within a couple of weeks or month.
1 month later...

I agree. I too thought this would pass but 6 weeks from inception? If anything, it's getting worse. Make a child board already so we can banish all the merit threads there. At this point, everything that could be said already has been.
2454  Bitcoin / Bitcoin Discussion / Re: Old fart needs help please. on: March 08, 2018, 10:55:56 PM
I know I can purchase bitcoins at a bitcoin ATM, but what do I do after I have the printed out receipt with the QR code on it?

I'm stumped here folks so any insight would be greatly appreciated.

Sweep the private key from the receipt into a wallet (like Electrum). Then send BTC as needed.

Some ATMs require you to set up a wallet before buying. In that case, you scan the QR code of your wallet at the ATM and the coins are deposited directly into your wallet.

I'm not trying to be difficult here, just trying to figure out if I can simply use a bitcoin ATM to send funds to someone without the hassle of linking my bank account.

Sure you can. You'll pay a hefty premium -- usually upwards of 8% -- but you can do it with cash.
2455  Other / Beginners & Help / Re: What Are The Dangers Of Multiple Coin Wallets? on: March 08, 2018, 10:31:59 PM
The most reputable ones are probably: Exodus, Jaxx, Coinomi, Eidoo, Enjin (some of them had security issues in the past). The downside of these wallets is that they are not open source so you will have to take the developers word when they say "We're not sending the private keys to our servers". I wouldn't suggest using these wallets unless you are using them for holding small amounts. I recommend buying a hardware wallet, both Trezor and Ledger support BTC, Ethereum and all ERC20 tokens, in addition to some alts.

In order words, would it be safe to say that no wallet is 100% safe, apart from the hardware wallet? Since the hardware wallets are equally multiple coin wallets, what are their downsides?

I wouldn't consider a hardware wallet completely safe. For example, Ledger device pairing practices are less secure than credit cards. You are also highly vulnerable to theft via physical access -- encrypted wallets on unmarked USBs or PCs are safer for this reason.

I think they are great for day-to-day spending, but nobody should be plugging all of their private keys into an online computer, and that's what people are doing with hardware wallets. I think exploits may surface at some point that can overcome the key shielding mechanisms.
2456  Other / Beginners & Help / Re: Can bitcoin get "corrupted"? on: March 08, 2018, 07:31:57 AM
I believe this case is quite famous and everyone knows about it these days, James Howells lost a stash worth 75 million bitcoins back in 2013, presumably lost somewhere under 20 tons of garbage in England.

http://www.wired.co.uk/article/bitcoin-lost-newport-landfill

As we are unlucky that we probably will never own 75 million worth in cryptocurrency, we certainly are lucky to not have lost it, if in a hypothetical world James Howells had found his hardrive, but it's partially broken, later he find out that it's possible to recover but half of the content is forever lost, in the logic of blockchains can data be "corrupted"? For example he loses half of the money and by a domino effect he ends up losing everything, is that possible? Embarrassed
I love thinking in hypothetical situations.  Cheesy

The two most likely outcomes are that he loses everything, or loses nothing. Either the wallet.dat is corrupted or it isn't. At this point -- in a landfill environment exposed to the elements -- that hard drive is probably extremely degraded. It would be a miracle if the wallet were recoverable.

The guy is still holding out hope that an excavation will be allowed even though it would be an ecological hazard. Sort of a wingnut. The city knows the bitcoins are probably lost.
2457  Economy / Reputation / Re: Would you trust someone who had been arrested multiple times for.. on: March 08, 2018, 07:10:16 AM
Would you trust someone who has been arrested for the below?

* Possess/Manufacture/Sell Dangerous Weapon
* Take Vehicle Without Owner Consent

Arrested but not convicted? That's not much to go on. I certainly wouldn't distrust someone over it. If the case wasn't prosecuted, we have to assume the charges were bogus.

no smoke without fire? 1 arrest very different from 3 or 4..

I am asking about someones character and if repeated arrests = good character.

Irrelevant. Cops are miserable pieces of shit. I've seen good people railroaded before -- doesn't take much. Try being on the wrong side of someone who is close to a police. Prosecutors tend to be more reasonable; they don't prosecute cases they can't prove. This is why juries exist. Pointing to an arrest record is just an appeal to authority. We don't know what really happened.
2458  Bitcoin / Press / Re: [2018-03-05] US Marshals to Sell $25 Million in Bitcoin at Auction on: March 07, 2018, 07:15:50 PM
Exactly! Although the price had recovered a month later and never has been below $375 since then, the selling did make an impact. That's why I think maybe something like that is happening this time too. Should it make an impact is another question. As I said earlier, I think it should not, because $25 million is nothing compared to $7 billion daily trading volume, as it is today for example. But still, how to explain the today's red market then? So, it's possible that the history repeats itself and thus people who are selling now at $10,500 will regret it later as well as those who were selling at $320 in November 2015.

What is to explain? Shift happens Cheesy
If there would be a logical explanation for every market move we would all be expert traders by now and we could pinpoint the price on 12-11-2056.

Yup, that's how the cookie crumbles. If everyone thinks the market will rally into the auction, the opposite should happen. The market usually likes to screw over as many people as possible. Cheesy

But the thing about volume..
Forgetting that most is fake, a lot of it is made by traders who buy sell buy generating a volume that day 10 or 20 the actual size of their stash.

Why is most of it fake? That was true in the heyday of the Chinese exchanges who had no-fee trading -- they had millions of BTC traded in daily volume. There is no comparison today. The highest volume exchanges (Bitfinex, Okex, Binance, GDAX, Upbit, Bitflyer) all charge fees now.

Leveraged orders = liquidity that all of us can buy and sell into. So it's just as "real" as spot trading volumes.
2459  Bitcoin / Bitcoin Discussion / Re: Cobra-bitcoin compromised. Bitcoin.org is not safe bitcoin site anymore on: March 07, 2018, 01:16:24 AM
CobraBitcoin is minor figure in Bitcoin world and honestly i'm not surprised to see people to join Bcash community. Whether his account is compromised or not, i'm sure Bitcoin.org is still safe since he's not the admin of the website.

This. Cobra has never been a significant contributor to Bitcoin.org. He's just leveraging his reputation as "co-owner" to make himself seem important. As David Harding points out:
Quote
For those who don't know, @CobraBitcoin may co-own http://Bitcoin.org but he's had little to do with the production, translation, and maintenance of its content. His major contribs are allowing Google to track pageviews, reducing server security, and gratuitous pontification

I'm pretty sure JihanWU support Bcash too so It make no sense If we take his last tweet in consideration where he is against Bitmain/Jihan WU.

I believe Cobra has been using Jihan Wu and the issue of mining centralization as red herrings. The intent is to divide the Bitcoin community against itself. Inevitably, a hard fork change to the proof-of-work algorithm (with significant support) will cause a permanent, sustained network split. Who benefits? Jihan Wu, Bitmain and Bcash.
2460  Bitcoin / Bitcoin Discussion / Re: My Prediction: By 2025, the U.S. will ban all use of non-regulated cryptocurrenc on: March 07, 2018, 12:47:38 AM
I believe that the U.S. will perceive or, at least, portray cryptocurrencies as an economic threat and will move to ban all use of cryptocurrencies that it cannot control, whether international or interstate or not, despite the consequences.

With the meteoric rise of cryptocurrencies and the inevitable backlash by legacy financial institutions, I believe this could happen in the next two years, but certainly by 2025.

As you point out, Congress must establish new authority to regulate cryptocurrency outside of the narrow scope (money transmission, securities, futures markets and taxes) federal agencies have jurisdiction over. Do they really have the mandate (regarding the electorate) to do what you're saying? 5% or more of Americans already own BTC. By 2025, how large do you think that number will grow?

Do you foresee another Executive Order 6102 coming? I suppose we know how that played out.

Quote
This power has been extended by the Supreme Court to regulating any economic activity, including, for example, growing food for your own consumption.

Wickard v. Filburn -- the "growing food for your own consumption" case -- established that the Commerce Clause applied where an activity "exerts a substantial economic effect on interstate commerce." What is the parallel argument for Bitcoin?

We should also note that the post-New Deal decisions you're referring to took place in a different judicial context:
Quote
During the post-1937 era, the use of the Commerce Clause by Congress to authorize federal control of economic matters became effectively unlimited. Since the latter half of the Rehnquist Court era, congressional use of the Commerce Clause has become slightly restricted again, being limited only to matters of trade or any other form of restricted area (whether interstate or not) and production (whether commercial or not).
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