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1  Economy / Economics / Re: If Greece defaults on: May 03, 2015, 10:02:57 AM
As johan; very clearly put it, defaulting, or other major economical/social disruption event is waived as a threat, but the fact is that even the right to have those is taken away from people.
Have you thought about those to question marks? Why not taking on the very wealthy? Why not taking on the church?
Really, why is directly impacting the bulk of the population assets more reasonable than a handful. If they were going to say "well, it's not fair, but we need to put the hands on working class people's pockets" why is it always out of question simple take over a couple of strategic large companies?

If this is as serious as they want to make everyone believe, then they could simple gather a couple of hundred soldiers and in one single morning take over the largest bank, or the largest power company and nationalize it. This is the way it has been done since the dawn of human history.
The matter in question here is not country finance or other bullshit they come up with, it is: "how can we still make business".

A few years ago, Venezuelan president Hugo Chavez acompained by militar force, headed up to Santander Bank's office and demanded the to leave the country while paying them in cash the estimated value of the bank. You might not like him (he's dead anyway) but this is the difference between actually wanting to fix an economical problem and just giving you some bullshit so you work harder and get payed less while their business is not disruped or abruptly take out of their hands.

Now all those think bitcoin can have an important role here, I haven't looked at the numbers, but I don't think bitcoin provides enough liquidity right now, it would need to be worth some 100 times more or so. But you cannot expect it to arbitrarily being inflated that much in a short period of time. That would be even worse than bootstraping a new currency.
2  Economy / Economics / Re: If Greece defaults on: May 02, 2015, 09:03:37 PM
There is no need for a plan B. The Greek government is still on track for its plan A:
Agree to any negotiation but never finalize anything. Start making silly claims (ww2 payments) yourself. In the mean time all of their personal assets are long safe. When finally nobody sends money to Greece anymore they'll go bankrupt.
Then tey'll blame it on everybody but thelselves.

Why they don't take on the chucrch ?
Why they don't take on the superwealthy Greek ?
Answer is easy, politicians from any party are very closely tied to both of those parties = corruption.
This looks obvious to me too, and I find this whole discussion silly.
3  Economy / Speculation / Re: I AM HODLING on: May 02, 2015, 08:49:52 PM
Lol, where did all the haters come from?
Really, coming here and talk about "oh but all those who bought at 1000".

Honestly, if you didn't get in when coins were cheap, then it is your fucking stupidity at work. Coming here and trying to get a bit of a consolation by talking about when the price was at 1000.... really, it's pathetic at best..it's pitiful.

Here's the deal with this thread: you HODL or you GTFO.

Don't reply to this post. If you don't get it plain and straight, there is no no discussion that will help.
4  Economy / Service Announcements / Re: [ANN] bitaddress.org Safe JavaScript Bitcoin address/private key on: April 11, 2015, 10:30:38 PM
Could you paste your pgp signature here at bitcointalk instead? Copy paste it into the opening message for example. It doesn't make much sense get it from the same website which authenticity I am trying to verify, specially over plain http.

Yes, done.

Thank you. sorry I didn't suggest this at first, but in adition to posting the key here (which greatly improves security) you could also upload it to a key server and update the tutorial to retrieve the key from a key server instead of from bitaddress.org.

It is fairly simple to do:
https://www.gnupg.org/gph/en/manual/x457.html

Anyway. Great work, been using it even more frequently as of lately. It is my favourite way of generating addresses as I can manually enter randomness, while many other wallets and address generators rely simply on RNGs which have been attacked repeatedly. All has been great using Bitaddress+mycelium.

I have another feature request if you're up to it:
in the wallet details tab, if the entered private key is bip38 encrypted, you could show the encrypted private key in HEX format too.

Either way, big thanks and keep up.
5  Bitcoin / Development & Technical Discussion / Any wallet or address tool that can show my bip38 encrypted keys in HEX too? on: March 14, 2015, 06:11:28 PM
That is the question. I want to save some keys in cold storage in a durable medium, but I don't have the means to use all the base58 charset. HEX would be a good format.

Does anybody know a solution? I guess I could roll my own quick script or tool, but this could go horribly bad if I make a mistake. On a related question, any trustable test vectors on there for hex<->base58 converters that include bip38 keys?
6  Bitcoin / Development & Technical Discussion / Re: BIP 32 questions on: March 11, 2015, 02:09:24 AM
I took that Stanford crypto class (and just barely passed it, dear god it was difficult), and the main thing I took away from it was "ZOMG DONT MAKE YOUR OWN CRYPTO."  Just use standard libraries and time-tested algorithms.  The best minds in the world came up with those and if they've been around a while, they're probably as good as you're gonna get.  Anything you come up with yourself is probably wrong, and you won't know it until you get hacked, because it hasn't been in the wild being tested and attacked.  Don't roll your own crypto!  Don't roll your own implementation!  Use the standard libraries.  That's what they're there for!!!
We are not talking about that, at all. We are discussing where to collect randomness from. A weak source of randomness will render the best cypher useless.
Also, if I want to extract randomness from /dev/urandom myself to pipe into electrum or sx, does it still count as 'doing it myself'?

Anyways, could anybody answer the questions in the opening post?

Abdussamad already answered partially.
7  Bitcoin / Development & Technical Discussion / Re: BIP 32 questions on: March 08, 2015, 03:54:00 PM
Well what is this below if not a scheme?
In that case every possible way of collecting randomness is a scheme. What is probing /dev/urandom everytime you need a random number, if not a scheme?

Obviously, gmaxwel's quote was refering to a simple deterministic function whose input is a known literary work, I'll agree that if it is simple to memorize such a scheme, then it is quite likely that other people could come up with it, then running it against known corpora is a matter of having the resources to do so. Such resources are relatively accessible nowadays.

A sentence from a book, regardless the language is a very bad idea, but it is not a relevant example in the context of this thread.
8  Bitcoin / Development & Technical Discussion / Re: BIP 32 questions on: March 08, 2015, 12:59:19 PM
Another way to convert your custom string into an electrum wallet is to do a sha256sum md5sum of it. If you are on a nix system:
It's really really inadvisable to do this, short human generated strings have very low entropy even (or especially) when you think you're being clever about it. Many people have lost substantial amounts of Bitcoin this way.
Why do people assume they are short? I don't need to save the string, it can be a few hundred chars text. I fail to understand how/why this would be a bad idea. Could you guys be more specific?

Say, for example, the body of this forum post I am writting at the momment. Why is it a bad source of randomness? Of course, if post it in here it becomes public, but before I submit it.

Read this:

https://bitcointalk.org/index.php?topic=311000.msg3345309#msg3345309


It doesn't apply. It refers to memorable brainwallets extracted from existing texts using schemes. No single condition of those three applies in here.

No sarcasm intended, why does everybody reads "manually entering randomness with a keyabord" as "making a brainwallet from a short memorizable string"? I ask because every single time this subject is touch, all the energy is spent pointing out the weaknesses of brain wallets, which is only remotely related. How de we discuss this without getting tremendously off-topic?

Quote from bitcoinj javadocs

Quote
Generates a new deterministic key from the given seed, which can be any arbitrary byte array. However resist the temptation to use a string as the seed - any key derived from a password is likely to be weak and easily broken by attackers (this is not theoretical, people have had money stolen that way). This method checks that the given seed is at least 64 bits long.
https://bitcoinj.github.io/javadoc/0.12/org/bitcoinj/crypto/HDKeyDerivation.html#createMasterPrivateKey-byte:A-

I don't understand this reasoning, what is wrong with using a string? This is even harmful, I guess some people will feed a byte array with low randomness into that function and think "I'm good, because I didn't use a string".
9  Bitcoin / Development & Technical Discussion / Re: BIP 32 questions on: March 08, 2015, 12:17:55 PM
Another way to convert your custom string into an electrum wallet is to do a sha256sum md5sum of it. If you are on a nix system:
It's really really inadvisable to do this, short human generated strings have very low entropy even (or especially) when you think you're being clever about it. Many people have lost substantial amounts of Bitcoin this way.
Why do people assume they are short? I don't need to save the string, it can be a few hundred chars text. I fail to understand how/why this would be a bad idea. Could you guys be more specific?

Say, for example, the body of this forum post I am writting at the momment. Why is it a bad source of randomness? Of course, if post it in here it becomes public, but before I submit it.
10  Economy / Service Announcements / Re: [ANN] bitaddress.org Safe JavaScript Bitcoin address/private key on: March 08, 2015, 01:15:52 AM
Could you paste your pgp signature here at bitcointalk instead? Copy paste it into the opening message for example. It doesn't make much sense get it from the same website which authenticity I am trying to verify, specially over plain http.
11  Bitcoin / Mycelium / Re: Mycelium spend from cold storage bip32 bip38 on: March 08, 2015, 12:32:33 AM
"spend from cold storage" is only the first time.

Each successive time is "spend from storage you think is cold unless you have some vulnerability in your phone that some hacker is logging your RAM with, in which case it's such a hot wallet that the sun don't got anything on it."

If you want to spend from cold, you need to look into Bither, where the cold storage is an offline phone/tablet device.

I'm not sure what you are trying to achieve by posting that, but I am pretty sure you didn't build your phone from raw naturally occurring materials, and as such cannot be sure that is actually not tapping every single screen frame into some evil entity's computer. The same goes for your computer. And you use bitcoin? Outrage!!
Do you open up each device you buy to check exactly if all the pieces match the datasheet from the manufacturer? Are you sure the guy at the store didn't bug your phone or your computer?

If you want to do secure computing look into "How to make your own abacus" where the device does exactly what you see it doing.

Seriously, I know the implications and risks of using bitcoin. Or a computer, can we please keep this on topic? Do you know the answer to my rather simple and direct initial question?
12  Other / Politics & Society / Re: How do we destroy ISIS an co? on: March 05, 2015, 11:01:55 PM
Oh, they could be anihilated relatively easily in very short time. There hasn't been interest in doing so by any country with the power to do it: china, russia usa or even possibly israel. In fact it was the US that created conditions for it to spring to life.
Hussein, kadaffi, Assad, they went and attacked/killed these and portrait them as incarnations of the devil. That is very stupid, those leaders were perfect for those countries. Look what hellholes they became after these leaders were removed from their chairs.
People critized sadam hussein and called him a murder, but what exactly is the right way to deal with the kind of people that makes up the ISIS as of today? Did he do so wrong? Would he get them under control with silly soft legislation like in western nations?

With less colateral damage than that already caused in iraq and afganistan in the last 15 years, it would be pretty straight forward to remove the isis of the map. But there is simply no country or political force with any motivation to do it.

That asside, I see a rather steady, and now rapid, exodus from the western delusional mindset of universal peace and silly assumptions that every third world person is a saint. Parties with more radical optinions both on the left and on the right will have their chance to try out different paradigms. EU might be dismantled because of this, many social assumptions such as tax paying, national defence, open borders, will be questioned and or eventually cease to exist. So I think the ISIS is having tremendous impact in the world, in the sense that they are opening people's eyes for the fact that assholes like them do exist and and more concentrated in some parts of the world and some specific ethnicities. This is a fact. Although I think that as soon as they try to set foot on any minimally functional country they will be stoped like a cockroach. The most direct candidates are of course turkey and iran, but even egypt could easily beat them
13  Economy / Speculation / Re: Wall Observer BTC/USD - Bitcoin price movement tracking & discussion on: March 05, 2015, 10:38:54 PM
This thread is still alive! Oh the memories. This is epic. Is this the biggest ever thread on the history of this kind of bulletin board forum websites? Speculate on that.

Love the poll, replied 'IDK'.
14  Other / Off-topic / Re: What ll we do if internet cut off (forever) :) on: March 05, 2015, 10:36:14 PM
The answer to the topic to title's question is: go out and drink. As for where would we spend our bitcoins: nowhere.
15  Bitcoin / Electrum / Encrypted seedshazer on: March 05, 2015, 02:54:19 AM
I don't think this exists, but I am curious about if this ever been discussed.

Is there any standard or any plans for encrypted seeds?
It could be nice to store a mnemonic on a piece of paper, but still require a passphrase to get the actual seed.
16  Bitcoin / Mycelium / Mycelium spend from cold storage bip32 bip38 on: March 05, 2015, 02:20:32 AM
I don't know if this is possible.

Does the 'spend from cold storage' feature supports spending from bip32 wallets?
What if those bip32 wallets are ecrypted (bip38)?
17  Bitcoin / Development & Technical Discussion / Re: BIP 32 questions on: March 05, 2015, 01:28:08 AM
Thank you for your replies. Abdussamad, that is kind of what I want but I think I prefer bip32. I'll look around a little bit more, it should be possible to do someting similar with sx, or other similar tool, but outputing a bip32 wallet instead.

Now, on a related topic, about the randomness of a randomness source, I am genuinely puzzled with some common advice I see. I might be missing something, but my biggest fear of loosing my coins comes exactly from RNGs. I do not trust them. We just need to look back a year or so to witness many "oh, the RNG was not so random after all", blockchain.info annd android bitcoin wallet have both proven to be weak on this particular matter.
I do not intend to criticize any of these services, quite the contrary, the fact that two well established wallets/services have been successfully targeted by RNG attacks goes to show that random number generation is indeed a weak link in the security chain. Therefore I feel much more peace of mind by controlling the source randomness myself.
I am not worried about replacing some randomness generated or collected by a piece of software on a machine called computer, what I am worried about is using that exact randomness. The reason being that it might not be so random.

btchris, I mean no sarcasm, irony whatsoever, but this confuses me:

Quote
If by gibberish you mean dice roles, a well-shuffled deck, or similar, I'd say that's a very good way to generate a wallet. If you mean "banging on the keyboard for a while"

If I type a long paragraph talking about a random topic on my mind, I can tell you with all  practical certainty that no other human being will come up with the exact same string, regardless of whatever method he uses to generate strings. I even believe 'banging on the keyboard for a while' could go a long way. In all seriousness, if the concern is reproducible patterns like "asdf"... then I think we're talking about people with very little understanding of large numbers, probabilities, etc. I think we can accept that a person can 'bang on the keyboard for a minute' and get a very random number as the outcome. Or, genuinely curious, why wouldn't this be true?
18  Bitcoin / Development & Technical Discussion / BIP 32 questions on: March 02, 2015, 04:51:13 PM
I've been looking into switching to HD wallets but there is still some things I prefer about vanilla bitcoin single addresses. I don't keep an wallet per se. I have my keys on cold storage and whenever I need to spend from them, I use mycelium feature "spen from cold storage".

I do not intend to radically change the way I use bitcoin as I feel that I have the amount of security I desire. However, I do want  to start using bip32 wallets instead and possible bip38 encription and possibly bip44 mnemonics.

So the first question is: How do I manually input randomness to a bip32 seed generator tool?
My favorite way of creating keys is manually feeding a very long string of gebrish to a brain wallet tool. I would like to do something like this, but instead of getting a plain bitcoin private key, I want a bip32 seed. If possible bip38 protected and in mnemonic format. I don't know if there is good support for combining these three. By good suport I mean, easily import it to a wallet software in the future. Or, even better, use something like mycelium's 'spend from cold storage' feature.

Another question is: How easy would it be to monitor the balance of an HD wallet?
I carry around the addresses on mycelium as watch-only addresses. I would absolutely want easy access to the balance while having my private keys secured somewhere else. I read that HD wallets have this number ( which name I can't recall ATM ) that is used to derive an address from other address. If I understand this correctly, compromising security of that number would only compromise privacy in the sense that the address hierarchy can be revealed, but the private keys would still be secure. Please correct me if I am wrong in here.
I do not mind managing those numbers with less security than my private keys, but one question still remains: how would easily check the ballance of an HD hierarchy of addresses? Do most wallets suport something like "HD watch only hierarchy"?

thanks in advance.
19  Economy / Speculation / Re: I AM HODLING on: January 05, 2015, 08:10:44 PM
HODLers!!!!

We have major entertainment today with the whole stamp fiasco.

How's your corn stash? Setting the stove on...
20  Alternate cryptocurrencies / Altcoin Discussion / Re: Dogecoin - is the bubble bursting? on: March 08, 2014, 09:14:53 PM
yes
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