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1901  Bitcoin / Legal / Re: Determinations of KYC and AML on: August 28, 2018, 12:04:35 PM
Thanks for the information everyone. Why do some ICOs restrict the US and certain territories?

Because in some territories ICOs are either illegal or legal grey areas.

For example as soon as founders allow US citizens to take part in an ICO, without actively seeking out the SEC's approval or abiding its regulation, the SEC will have a close eye on them; legal problems being almost assured regardless of the founder's country of origin or operation.
1902  Economy / Economics / Re: Seeking a legit article website. on: August 28, 2018, 11:16:11 AM
It's impossible to give you what you want. All news are fakes (or not a full truth). [...]

Note that there's still a difference between biased news and outright lies. Assuming subjective statements are just as unreliable as objectively false statements leads to regretful decision making and unfortunately is an epidemic way of thinking right now.


[...] More good articles can be found at new.bitcoin.com and also some of the sites which are great in evaluating the coins's real time state, for example, crypto compare.

Be aware that Bitcoin.com is often referring to Bitcoin Cash (BCH) as Bitcoin though, so following Bitcoin.com may inadvertently lead to a misunderstanding between the current state of Bitcoin Cash (BCH) vs the current state of Bitcoin (BTC).

Cryptocompare is indeed a great resource for researching alts and getting a good overview of each crypto's spec.
1903  Economy / Economics / Re: Stop talking about cashless society! Let us preserve mother nature! on: August 28, 2018, 09:49:59 AM
[...] How will they do it without using the natural resources to power up their digital equipment? [...]

How does one create physical mediums of exchange such as bank notes and coins with using natural resources?

For all its downsides going paperless and digital has likely decreased the amount of paper and ink wasted for not only creating physical cash but also invoices, documents, etc. We already live in a digital age. Unless you want to go back to pre-internet days we might as well leverage existing technologies for more productive tasks than posting on online forums.
1904  Economy / Economics / Re: Seeking a legit article website. on: August 28, 2018, 09:32:19 AM
Some of the more established crypto related news sites include coindesk.com and bitcoinmagazine.com.

Reader beware, though. Pretty much all crypto related news sites are heavily biased towards rather bullish sentiments and sometimes specific technologies. I personally would take anything I read on there with a giant grain of salt.

If you mean news in general I guess just go with Reuters? Many large news sites take their news from Reuters anyway, so might as well get it from the source.
1905  Bitcoin / Project Development / Re: CloudFish and Hacking on: August 28, 2018, 08:41:27 AM
In contrast, CloudFish developed a proprietary technology that encrypts the digital enterprise assets like documents, emails, IPAs, crypto-currencies [sic] etc. It then splits the encryption key into millions of pieces and distribute [sic] it on block-chain [sic] thereby making it virtually impossible for a hacker to decrypt and steal the sensitive data. The dynamic key split and reconstruction mechanism on block-chain [sic] is a proprietary technology of Cloudfish [sic] for which a patent is in-progress.

If you split the encryption key into several parts that are stored on one of the many public blockchains in a way that (by necessity) is recoverable by your service... what prevents a hacker to recover the encryption key in the same way that your service does?
1906  Bitcoin / Bitcoin Technical Support / Re: [overview] Recover Bitcoin from any old storage format on: August 27, 2018, 11:18:52 AM
[...]

Seed phrases

[...]

Why not link directly to the BIP39 word list as well? Smiley
https://github.com/bitcoin/bips/blob/master/bip-0039/bip-0039-wordlists.md

It is also worth noting that 24 word seed phrases are also fairly common (eg. Trezor One, Ledger Nano S)
1907  Bitcoin / Bitcoin Technical Support / Re: How useful is Backup against Ransomware on: August 24, 2018, 10:17:24 PM
[...]

But do you also unmount (or unplug) your hard drive each time after the backup ?
If your drive is plugged in and mounted the ransomware will simply also encrypt the backup.

[...]

Same is also true for NAS drives and shared network folders. Worse still, if multiple machines within your network have access to the same NAS (which usually is kind of the point), every machine becomes a liability.
1908  Bitcoin / Development & Technical Discussion / Re: Smart Contracts - just a buzzword or are they applicable to the real world? on: August 23, 2018, 08:09:05 PM
...
That being said, I fully agree -- decentralized storage systems are a very interesting use case for smart contracts.
...

I´d contradict this statement by using your own argument from a previous
post in this thread  Cheesy

...
What I meant to say is this: From a practical perspective, a new decentralized solution needs to be significantly more
convenient and / or cheaper than an established centralized one. Even if both solutions are equally viable,
people will rather stick with an established solution rather than trying the new one. Put differently, smart contracts
either need to find a business that they can vastly improve upon (like Uber / Lyft did with Taxis) or find an underserved niche (like Bitcoin did with global P2P payments).

People will probably stick with Dropbox, iCloud and similar services for data storage (and
businesses with services like Amazon AWS that are very flexible). These services work
fine for most use cases and the average user is either not aware or not particularly interested
in decentralized, trustless solutions. The fact that a service like iCloud is heavily integrated into
the Apple ecosystem makes it even harder for a decentralized competitor like Sia to gain any traction.

[...]


Ha! Grin

Still, I stand by both my statements, as I believe that decentralized storage is easier to solve than some of the other hypothetical scenarios already mentioned in this thread for one simple reason:

[...] So the smart contract can directly interact with the service, not with a "representation" of it. No oracle is needed. [...]

(granted, many use cases that often get hyped in the context of smart contracts are imho close to impossible, so "easier to solve" is a rather relative expression)
1909  Bitcoin / Development & Technical Discussion / Re: How much Terabyte needed to get 51 characters all possible combination? on: August 23, 2018, 04:38:37 PM
Combination is not the term, I guess you mean permutations and it is 50! = 3.04140932*10^64 which you can't store it anywhere not just because of capacity problems but also because of the time required for writing them, it would take billions times the galaxy's age for a multiple penta byte per second write operation, I suppose.

That's assuming you only have 50 characters available in total (over a string with the length of 50) of which each character can only be used once.

I'm afraid mfyilmaz is a bit closer to the truth.

Still none of you guys have answered OP's question Sad

Using WIF (as requested by OP) would add unnecessary overhead to storing the private keys, so we're gonna save some storage and will just go with barebone private keys.

So taking the numbers as calculated by mfyilmaz and bob123:

Quote
2^256 = 1.15 * 10^77

You get 1.15 * 10^77 possible keys with a size of 2^256 bits (= 32 bytes) each so you get 32 * 1.15 * 10^77 bytes for storing all possible combinations of a 256 bit key.

32 * 1.15 * 10^77 equals 48 * 10^77 bytes which is 48 * 10 ^ 68 65 Terabytes, ie. 48,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 Terabytes or roughly the amount of data you could store using 2 X chinese kids, an abacus and 30 minutes.

(edit: Thirdspace's post reminded me that Tera = 10^12 not 10^9)
1910  Bitcoin / Development & Technical Discussion / Re: Smart Contracts - just a buzzword or are they applicable to the real world? on: August 23, 2018, 11:02:49 AM
[...]

But there is a notable exception, an use case where a smart contract manages a non-financial asset: Storage management. I refer to systems like Siacoin, where a smart contract checks if certain files are hosted by a server "node" - if yes, it rewars the node owner, and if not, it punishes it. It's possible that there are unknown problems with this approach, but until now it seems to work, while it may be not a complete replacement for traditional hosting, it can be a very cheap, a little bit less reliable alternative.

So decentralized storage systems, even maybe more advanced "decentralized web" concepts (like Maidsafe), could be an interesting non-financial use case. The reason for that is that storage systems have to be reachable permanently by online services, via the Internet - just like blockchains. So the smart contract can directly interact with the service, not with a "representation" of it. No oracle is needed.

[...]

It's a bit nit-picky but I'm not sure if I'd call decentralized storage systems in themselves smart contracts. I'd define a smart contract as a script that is interpreted by a decentralized network but not intrinsic to it (eg. storage management is an intrinsic functionality of decentralized storage systems whereas LN is not intrinsic to Bitcoin).

That being said, I fully agree -- decentralized storage systems are a very interesting use case for smart contracts. For example one could imagine a self-scaling system that buys more storage space on the fly whenever needed. Or extending automated web application deployment with a script that autonomously purchases storage space and CPU cycles. Whether such approaches would be viable in practice though are a different question.
1911  Bitcoin / Legal / Re: The Disadvantages of Bitcoin on: August 22, 2018, 03:32:56 PM
Quote
Myth #1: The blockchain is a giant, distributed computer

The redundancy that is critized in this section is actually what allows Bitcoin to be censorship resistant and permissionless. You don't have to trust, you can verify. And for that one requires utmost transparency. Additionally, the more copies there are, the harder it is to take down.

You may know rendundancy from another, perhaps more familiar concept: Making backups.


Quote
Myth #2: The blockchain is everlasting. Everything that is recorded into a blockchain will remain there forever

There's no debunking of the headline "myth"? Just further critique on the redundancy of blockchains. See above.


Quote
Myth #3: The blockchain is effective and scalable. Conventional money will soon disappear

I agree that both claims are a myth, but I still wonder what he means by that:

Quote
it is standard practice to wait 50 minutes more after each new record appears because the records regularly roll back.

I'm not sure which blockchain he's talking about that "regularly rolls back" but it's definitely not Bitcoin. There are orphan blocks, sure, but they are rather rare and usually don't go further than 1-2 blocks deep.

It is also worth noting that while blockchains themselves are very bad at scaling, the technologies being built on top of them are not.


Quote
Myth #4: Miners provide network security

They do though.

Quote
the problem is that miners are protecting Bitcoin from other miners.

In theory yes, in practice no, due to mining incentives (ie. block subsidies and transaction fees) keeping forces in check.

Quote
If only one-thousandth of the current number of miners existed, and thus one-thousandth of the electric power was consumed, then Bitcoin would be just as good as it is now.

In theory yes, in practice no, due to the cost of attacking the network now being a thousand times cheaper.

Quote
Traditional payment systems are immune to such an attack.

Not really though:
https://www.reuters.com/article/us-mexico-cyber/thieves-suck-millions-out-of-mexican-banks-in-transfer-heist-idUSKCN1IF1X7
https://www.reuters.com/article/us-city-union-bank-swift/indias-city-union-bank-ceo-says-suffered-cyber-hack-via-swift-system-idUSKCN1G20AF


Quote
Myth #5: The blockchain is decentralized, therefore it is indestructible

Centralization is obviously something to keep an eye on, however:

Quote
Gaining access to just four controlling computers would gain someone the ability to double spend bitcoins. This, as you can imagine, would depreciate bitcoins somewhat, and doing it is actually quite feasible.

I doubt it's "just four controlling computers" that someone would need to gain access to. I also doubt it's "actually quite feasible" because that would leave me wondering why double spends aren't happening on a regular basis.

Quote
But the threat is even more serious than the above might imply, because the majority of pools, along with their computing powers, are located inside one country, which makes it much easier to capture them and gain control over Bitcoin.

...eradicating billions of dollars worth of investment in hardware, infrastructure and developing knowledge. Sure thing.


Quote
Myth #6: The anonymous and open character of the blockchain is a good thing

Rather misinformed.

Quote
How much money I have at any given time.

Not possible without knowing all other address that are under the target's control.

Quote
How much I spent and, more important, what I spent it on.

Not possible without knowing all other address that are under the target's control and every counterparty they have been interacting with.

Unless the mother or friend of the author's example happens to have a knack for big data and machine learning I doubt they'll find out all that much about any financial history.

Also...

Quote
Some disclosure may be tolerable for individuals, but it is deadly for companies. All of their contracting parties, sales, customers, account amounts, and every other little, petty detail would all become public.

Oh the humanity! Companies being forced to act transparently and therefore potentially being liable for misconduct, embezzlement and tax evasion! Just imagine if one could see how money flows from companies to shell companies to lobbyists to politicians! Oh geez!

smh.

That being said, some of the scaling solutions that are heading for Bitcoin will improve Bitcoin's privacy (or come at the cost of transparency, depending on how you want to look at things); most notably Lightning Network.
1912  Bitcoin / Bitcoin Discussion / Re: Bitcoin Mining Giant Bitmain Invests in Blockchain Data Storage Startup on: August 22, 2018, 02:24:40 PM
this is very good news! even at a decreasing price bitcoin, people continue to invest in crypto currency! this is a good sign for many investors who are afraid to invest their money!

Well... I mean it's Bitmain, investing in crypto is kinda their thing. I'd be more worried if Bitmain would stop investing in crypto-related projects rather than continuing business as usual.
1913  Economy / Economics / Re: What will happen to global economy when crypto becomes global currency? on: August 22, 2018, 02:07:43 PM
The world will still need local, governmental fiat currencies. You need some sort of inflationary money to enable and reflect localized growth.

Without inflation, credit becomes near impossible.

Without credit, future-oriented investments become near impossible.

Without future-oriented investments, economic growth becomes near impossible.

Despite all the flak it gets, credit and inflation serve a very important role. That is the ability to borrow from the future to generate wealth in the present. Obviously goes awry sometimes, but you should get the idea.

So while I see cryptocurrencies having the potential of being globally accepted like fiat currencies, potentially decreasing the need for exchanging into a foreign currency, I don't see them replacing fiat currencies.
1914  Other / Meta / Re: The Place of Knowledge in post replies on: August 22, 2018, 01:34:22 PM
[...]

This makes me wonder, have you been ever confronted with a topic where you click the 'reply' tab and without a clue as to how to what to type in response and how to contribute meaningful, and this forced you to research some more about the subject matter before returning to post a reply?

Not quite. When I'm a bit hazy on the details I'll check google to refresh my memories and recheck whether I remember things correctly. Sometimes this gives me links to provide as further reference. Sometimes it turns out I know jackshit after all, at which point I have a new thread to watch (rather than to post to). It's a win win either way.
1915  Bitcoin / Development & Technical Discussion / Re: Is there any Blockchain/Wallet not requiring C++ Skills? on: August 22, 2018, 10:53:58 AM
Not blockchain, but the wallet of the DAG-based ByteBall currency is JS / NodeJS based:

https://github.com/byteball/byteball

I'm not attesting to any quality of the code or the currency, but it might get you started.

If you're serious about software development in this space though you likely won't get to avoid the likes of C++ for too long.
1916  Bitcoin / Legal / Re: is bitcoin is a private currency on: August 22, 2018, 09:10:56 AM
Given definition by HeRetiK, it means that bitcoin is a private currency as it was defined as "decentralized" and what cryptocurrencies are? they are decentralized currency though some aren't. [...]

Centralized currencies are covered by the definition quoted as well:

A private currency is a currency issued by a private entity, be it an individual, a commercial business, a nonprofit or decentralized common enterprise.

I'm pretty sure centrally issued currencies such as Ripple have always fitted the definition of private currency to begin with.

Still, don't get too hung up on what Wikipedia says a private currency is.
1917  Bitcoin / Development & Technical Discussion / Re: Is blockchain really needed for security? on: August 22, 2018, 09:02:18 AM
Creating a "blockchain" for the sake of having it called a "blockchain" is moronic.
Yes Proof of Work is the major security feature and must be the basis of the technology's name but in terms of digital currency, the process of "creating blockchain" and the nodes where the "blockchain" was being stored are working together to provide the "advertised" security.
POW creates blockchain, nodes are hodling/verifying blockchain; blockchain is still a logical choice of term. (one more time: blockchain)

That's just terminology, it still depends on how people define "blockchain".
In applications other than crypto, IMO, they can call it whatever they want.

If there is no agreed upon definition then "blockchain" is nothing more than a term used to join the bandwagon. Anything can be a blockchain according to your belief, which is also moronic.
Haha, that clearly not what i mean.
That's why I hate Terms, a person may know what the "thing" is, but he may be unaware of what it is called.

I mean IMO, the blockchain technology can be called other than "blockchain" if it isn't applied to digital currencies.

That's the problem though, the label "blockchain" is slapped on pretty much anything that even remotely fits the bill with total disregard of existing expectations in terms of security and permissionlessness.

Obviously language is always flowing, as is terminology, but if you dilute the meaning of a term too much it ceases to transport information.

Worse still, if a term has a (more or less) concrete definition in one context (eg. "a blockchain is a permissionless, distributed ledger secured by a decentralized consensus algorithm") but no concrete meaning in another context (eg. "blockchain is the magical solution to everything that is wrong in the world") using it as a fraudulent label becomes trivial.

Sure, the misappropriation of technical terms towards meaningless marketing-speak is nothing new, but at least to me it seems like "blockchain" is one of the worst offenders yet.
1918  Bitcoin / Legal / Re: is bitcoin is a private currency on: August 21, 2018, 01:14:12 PM
As per Wikipedia, the definition of a private currency is as below,

"Private currency is a currency issued by a private entity, be it an individual, a commercial business or a nonprofit enterprise. It is often contrasted with fiat currency issued by governments or central banks. In many countries, the issuance of private paper currencies is severely restricted by law."

So as per the legal definition, bitcoin doesn't qualify to be a private currency. Bitcoin or any other crypto currency is mainly a new kind of currency whose legal definition is still not framed correctly. Definitely these are not private currencies by the definition. Private ICOs are more closely related to private currencies by definition where the tokens are issued and controlled by a certain company using a private blockchain.

Interestingly your Wikipedia quote doesn't seem to be up-to-date anymore Wink

The page currently reads (according to the revision history since July 7, 2018; emphasis mine):

A private currency is a currency issued by a private entity, be it an individual, a commercial business, a nonprofit or decentralized common enterprise.

Wikipedia's definition aside, whether something legally classifies as a private currency or not completely depends on what your local laws say, period. Whether you agree with the definition or not is for the most part irrelevant (unless you have, say, government ties). If you want to change the language surrounding cryptocurrencies, that's a different topic altogether.
1919  Bitcoin / Bitcoin Discussion / Re: Bitcoin will be stronger this time on: August 21, 2018, 11:52:55 AM
Waiting for an ETF approval is overrated.

The mechanics of Bitcoin's valuations are much simpler in my opinion: Every time Bitcoin doesn't die, people gain trust and Bitcoin grows stronger.

ETF or no ETF, I don't see Bitcoin dying anytime soon, so I'm fairly optimistic regardless of what the SEC decides.
1920  Other / Meta / Re: Mod, please check new plagiarism: Reporting copy/pasting, please permban on: August 21, 2018, 10:44:06 AM
Jr. member crypto_koins copy / pasting a Medium article (replacing the bullet point "Use ProtonMail" with "Use encrypted email server" for whatever reason):
 

Copy:

If we keep our money in a bank then we don’t need to worry about safety because it’s ultimately up to the bank to protect that money. We pay fees for the account to be maintained, so if someone robbed that bank, the bank would insure the funds so that we would not personally lose.

Crypto space is different, we are our bank.
What comes with that is responsibility; the responsibility to protect our assets. These assets are digital and guess what — digital assets can be hacked. Just like a bank can be robbed, a hacker can stroll on into your personal bank (your crypto wallet) and take what is yours. No insurance and no one to blame.

If you’re storing crypto assets in wallets there are a number of things you can do to protect yourself. Keep these five tips in mind to keep your digital assets secure.

1. Use a hardware wallet
When you leave your money on exchanges there are lot of things that can go wrong. Governments might freeze the funds in the exchange. Your account might get hacked. Your exchange might get hacked and so on. Most of these exchanges not having proper customer support only adds to the problem. And hence it is suggested to move your funds which you don’t use for trading to an offline wallet.

2. Use Two Factor Authentication
If the wallet offers a two-factor authentication (2FA) take it. This means that if someone had access to your login details, they would also need your phone to get the 2FA code. However, note that text and email 2FA are not recommended as these can easily be intercepted if someone has access to your email, or ports your phone number to a new device.
Paul Makowski, PolySwarm CTO, suggests the best 2FA options, in order of most to least secure, are as follows:
•   Hardware dongle, see: https://landing.google.com/advancedprotection/
•   An app on your phone that doesn’t sync your secrets anywhere (e.g. Google authenticator)
•   An app on your phone that does sync (e.g. Authy)
•   Email based
•   SMS based

3. Don’t Use Public Wi-Fi
We have access to public WIFI in a variety of places, from libraries and councils to hotels, cafes and airports, allowing for an anywhere office. Crypto is 24/7 and hackers know it, and access to Wi-Fi makes it tempting to log into our accounts, wallets and exchanges on-the-go. But this is risky.
The vulnerability that comes with public Wi-Fi is that they make it easy for hackers to access computers that are connected to that network. There are three specific ways in which public Wi-Fi is risky, as David Maimon, Assistant Professor in the department of Criminology and Criminal Justice at the University of Maryland told Digital Trends:
•   Man-in-the-middle attacks
•   Malware
•   Wi-Fi sniffing

To avoid this issue, don’t have your Wi-Fi turned on, allowing it to search and connect public Wi-Fi connections. Have it turned off and carry with you an internet dongle for private connection instead. Something that costs you $10 a month could save you hundreds of thousands of dollars in asset protection. If your data plan allows for it, you can also use your own hotspot from your cell phone.

4. Beware When You Download (Even On Your Phone!)
Files can have malware attached to them and once on your device, that malware can action a number of sinister commands. Gone are the days that the only concern is someone racking up your phone bill or data. Now we need to worry about the malware reading keystrokes, granting hackers access to our accounts and even allowing them to read the screen on our phone.
Be cautious when downloading files, not only in email. Remember that there are clever people out there in crypto. You’ll notice files posted in communities, on Telegram, Facebook, Reddit, Bitcoin Talk, etc. As tempting at it is to click them, be aware that they could be bait. Always use caution. You can even use Kapersky’s File Desk to quickly check links and files.

5. Use encrypted email server
Whether you have a free online email or own your own server, you’re vulnerable to malicious email access. ProtonMail is an encrypted email service that takes a different approach to email security. The encryption means that no one but you can read your emails, not even ProtonMail themselves.
Note: that we do not work with nor endorse ProtonMail, it is merely a resource the author believes may be valuable.

6. Keep Private Keys Offline
If you have wallets on your computer, always store your private keys offline either on an external hard drive or as a hard copy, stored someone in your house. If someone gains access via malware or public Wi-Fi, this allows you to limit what they can find or take, which buys you time to realize that your device is comprised before anything important is stolen.

If you found this article helpful do share your feedback. Thank you.



Original:

https://medium.com/polyswarm/5-ways-to-prevent-your-crypto-wallet-from-being-hacked-981acd86bc43
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