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9901  Other / Meta / Re: Give us a place to post our bitcoin address on: June 11, 2014, 07:24:44 AM
Just send a PM to DefaultTrust now, write down the PM id and the address in a safe place and you are fine.

I did that, but a PM is not sufficient is prove who I am to others.
-snip-

Thats true, but the point here is to prove to theymos who you are. Not as an identifier, but as in: "I am the person that had control over this account on 11.06.2014". If its enough for theymos to change the mail address, its enough for me because I know I can regain control over this account in the future.
Signatures in general can not prove who you are unless you exchanged the public keys in person. I dont know if there is a web of trust for BTC signed messages, but even with PGP most ppl dont even bother anymore.

-snip-
I am gonna do this just now to be on the safer side. Do I just need to sent my address or can I include my gmail which has 2fa enabled?

Edit: I sent him a pm with my address, how do I save the PM Id?

I personally have it in a encrypted textfile that is safed on 3 seperate machines, among other information.

In case I got the question wrong and you are asking "where do I find the ID":

https://bitcointalk.org/index.php?action=pm

-> outbox -> klick msg subject -> check address bar bitcointalk.org/index.php?action=pm;f=outbox#msg1234567890
the red number is the id.
9902  Other / Meta / Re: Post your BTC Address here, in case your forum account is hacked. on: June 11, 2014, 07:11:12 AM
-snip-
Well sorry for trying to help.....

While I personally appreciate that you are trying to do something, I dont think this is a solution. The reasons are listed above, no need to repeat them. What would help IMHO is if someone would post a step by step guide how to do this via PM to "DefaultTrust" in the beginners and help section. If noone does this I will do this eventually, I just had no time to do so yet. Maybe you want to do it. If you have any questions send me a PM.

Well, I guess we don't need a single thread to collect BTC addresses because they can be searched for in post history....

It's a decent idea tho.

Posthistory can be manipulated by the person that took the account. There are very few places where you can not edit your own post.
9903  Other / Beginners & Help / Re: How to read the statistics? on: June 10, 2014, 08:36:54 PM
By all mining pools, I mean all pools, that are mining bitcoins, at the time a draw those statistics.

If these pools, are in a way connected to say, blockchain.info and other pools are connected to other exchanges, I am seeing only some of the total mining pools out there.

Blockchain.info is not an exchange. Its a website that allows you to view the data in the blockchain. They also have a wallet, but AFAIK you cant buy/sell BTC there. Since they analyse the blockchain they also know all miners. Unless the miner never made a block.

If it shows ALL mining pools, that are mining now, the 51% attack, is very close for Ghash.IO. {Although it's not that serious, but still something to look at} No?
10% is not close. 10% is 8 PH/s or 8,000 TH/s or ~ 15 Million USD1 currently. And 55% of the GHash.io miners are individuals who could just switch the pool, so they are actually sitting at ~20%.

Never forget: its a pool. Its not a single person controlling that much hashingpower, its a group and abandoning a pool is as easy as flipping a switch.

There are also easy counter messures: http://gavintech.blogspot.de/2012/05/neutralizing-51-attack.html

I asked if the double spend count of 23 was a lot, for the last 500 000 transactions, because I do not know what is acceptable.

Hope I make my question a bit more clear now?

My answer was: I dont think 0.0044% is a lot.

[1]: https://bitcointalk.org/index.php?topic=576844.0
9904  Other / Beginners & Help / Re: How to read the statistics? on: June 10, 2014, 07:24:56 PM
I went to one of the exchange's and got this info on mining distribution.

https://blockchain.info/pools

Does that show all mining pools

it shows all known pools. those that are not known are shown as "unknown".

, or only the pools linked to blockchain?

blockchain =|= blockchain.info

If it's all blockchains, a 51% is very close for Ghash.IO

There is only 1 blockchain. 40% << 51%

Does a miner only have to have 51% on a exchange, to be able to double spend, or mining as a whole?

51% of what? 51% of the volume of an exchange makes you a whale, you are able to move the price around but not doublespend.

>50% of mining power allows for a "51% attack"

And is a 23 Double Spends detected in the last 500,000 transactions, high or low and acceptable ?

https://blockchain.info/double-spends

I should actually not paste the link, because it will change, but I am lazy.

0,0044% im fine with that.
9905  Economy / Services / Re: [PrimeDice] [Highest Paid Signature] Earn up to 2.4 BTC/Month by Posting on: June 10, 2014, 06:49:40 PM
Hi there,
Just to say first:
I WILL NOT COUNT THIS POST AS CONSTRUCTIVE OR PAID ANYHOW!


I want to know, but not want to PM Stunna with question which is already asked somewhere.
So, I  became a SR Member today and I joined the campaign since I was Full Member and I want to know at what rates i will be paid at 17 of june? Thank you very much!

I am not trying to spam on this threat I will not count this post as paid !
Thank you!

Best Regards,

Gondel


The proper thing to do IMHO would be to note your postcount before the change and after the change. PM it to stunna when its payday and see what he will pay you. He was very generous with me in the past when I was honest.
9906  Other / Beginners & Help / Re: How to get Public Key in Multbit? on: June 10, 2014, 05:02:33 PM
Thank you shorena, finally someone gave the correct answer to my question. I'll try it now.

#7 decode the base58 private key https://en.bitcoin.it/wiki/Base58Check_encoding
#8 follow the steps here https://en.bitcoin.it/wiki/Technical_background_of_Bitcoin_addresses to get your public (!) key

Ok, I didn't understand a single word about these two steps. Can you provide an example or tell them in a noob-friendly way?

as it was allready posted here:

I answered this in the other thread but since this exists I think it's relevant to post this here as well:

It is not that simple, I don't think you can see it from the wallet as it is. I do not use Multibit, though. One thing to note right away is that your address is generated using a cryptographic digest (hash) of your public key, so there is no way you can go back. It is not possible to compute the public key using your public bitcoin adress.

You will need to use your private key to calculate that, there are some tools for this luckily and the easiest method I can think of is going to https://www.bitaddress.org and choosing "Wallet details". There you can input your private key in pretty much any format it happens to be in and it will calculate for you the public key, either in the 65-byte uncompressed format or the 33-byte compressed format, whichever you need. As far as I remember, the page also works offline so you can do that for security and you should, too.

To see yout private key, export your private key to a file in Multibit and open the file in your favourite text editor.
Can I ask, what do you plan using your public key for?

There are implementations that can do that for you. If you dont trust the homepage you can just use their code.

https://github.com/pointbiz/bitaddress.org

9907  Other / Meta / Re: DEAR THEYMOS PLEASE help unlocck my account.. on: June 10, 2014, 04:59:11 PM
-snip-
I already Sent him a PM, also to default acct but no respond at all. it's almost 3 days I think.

If you have no answer after 3 days you are doing it wrong. See the answer I posted for someone else with the same problem.

why doesnt theymos respond to PM ?
he reads threads... but not PMs... kinda pointless.. perhaps we need someone who can read PMs and help ppl.

Im sure themymos read the PM. The PM however is missing something very important.

-snip-
I've checked before sending. Looks right.

-----BEGIN BITCOIN SIGNED MESSAGE-----
My account technomancer has been hacked/lost. Please reset the email to xxx@xxx.com. The current date is Jun 8 2014.
-----BEGIN SIGNATURE-----
1USDaf42U2ytrCqHVsC3uHmYHrdeA59B8
HG2j.........x.......x......x......x.....x....x.......................0Nspk3Zc=
-----END BITCOIN SIGNED MESSAGE-----

Also I used unique e-mail address. Not related with any bitcointalk account.

a reference that the address 1USDaf42U2ytrCqHVsC3uHmYHrdeA59B8 was used by the person who controlled the account in the first place. I can make a PM like that. Thats no proof that technomancer is my account.

The way this works is very clear. If you can prove with a single PM that you own the account you are fine. If you are unable to make this PM you make a new account. Technomancer, Bitcoinmafia and all the others that are whining and begging here currently are unable to make this PM. Why should theymos change the mail on those account if there is no proof?

Code:
-----BEGIN BITCOIN SIGNED MESSAGE-----
My account technomancer has been hacked/lost. Please reset the email to xxx@xxx.com. The current date is Jun 9 2014.
-----BEGIN SIGNATURE-----
13JtNLfPLwVmQg5sjdMkJb7d8RjDFtJb1D
IDcXWpU2CpzKTE5LnaLSHyB5t0tTAYC+GS6aTYM3FUIU3eah7+iGNVJ/4KbAuZiV0QjZ5b0ue+R58ABkMGKEcUI=
-----END BITCOIN SIGNED MESSAGE-----

Should I get that account now? No I shouldnt.

The message should look like this

Code:
-----BEGIN BITCOIN SIGNED MESSAGE-----
My account technomancer has been hacked/lost.
I used the address below
in this post https://bitcointalk.org/index.php?topic=137
and also in the PM with the ID 555
Please reset the email to xxx@xxx.com. The current date is Jun 9 2014.
Thanks in advance
-name
-----BEGIN SIGNATURE-----
1myAddress
mySignaturE=
-----END BITCOIN SIGNED MESSAGE-----

/Captain obvious
9908  Other / Beginners & Help / Re: Transaction cost question, for poor people. on: June 10, 2014, 04:49:38 PM
Some people says, transactional fees are "Free". That is what makes crypto currency, better than debit and/or credit cards. {Because they charge huge fees}

But if your transaction fee is set to zero, no miner will pick it up, right?

Nope:

-snip-
If your transaction satisfies 3 conditions (https://en.bitcoin.it/wiki/Transaction_fees#Sending), it will get confirmed pretty quickly (usually within an hour from my experience) without any fee.

But even if your transaction does not fit these conditions it will most likely get accepted within a week. There are miners out there that do not require a fee. When the make a block you TX can be in there and you are fine.

If you increase it, it would also increase the speed, at which, your transaction would be processed.

Up to a certain point yes. The miners still need to find a block. You can pay 17 BTC fees if the next block needs 1 hour to be found your TX will take 1 hour for 1 confirmation.

Now, how does that help the person, from a 3rd world country, paying in his currency, which is much weaker, than say the USD $.

The guy in USA pays e.g. 0,0007631 / 50 cents US and think it is fair, but the guy in the 3rd world country, pays for example in Argentine Peso and pay 4,064 peso.

0.0007 is 45.5 cents, the fee (assuming 1 kb TX and 650USD/BTC) would be 6.5 cents which is a lot in comparisson.

The guy in the US cannot buy a hamburger with his 50 cents, but the guy in Argentina, can buy 2 hamburgers with that, so for him it's expensive to pay 0,0007631
to get his transaction processed.

It would not be a viable option for poor countries to accept it as a payment method.

What am I missing?

What you are missing is that #1 you can still pay cash, #2 if a shop accepts credit cards, every customer pays the fees. everything you can buy is a little more expensive so some can pay with CC with bitcoin you pay only your own fees. People usually forget fees they dont see and complain about those that they are see. Typical costs are 3-5% + 0.10-0.25 EUR sometimes up to 10%. Lets compare that to your 45.5 centUSD ~ 33.5 centEUR + 3% = 34.505 + 0.10 fixed price = 44,5 centEUR.

Even if you pay cash you pay this fee! Everytime you buy something in a shop that accepts CreditCards!
9909  Other / Beginners & Help / Re: Potential wait of 10 minutes at POS? on: June 10, 2014, 04:33:37 PM
The last couple of BTC transactions I've done took about 10 mins to 1st confirmation. This was for small amounts (under $100) and I paid a 0.0002 transaction fee.

A fee over 0.0001 per KB does not make your transaction faster. The first confirmation means that your transaction was included in the blockchain. For that the miners need to find a block. You cant just throw money at them and hope the will find a block, they are allready searching as fast as they can.


If we want bitcoin to take off with casual users is it likely that people are going to go into a shop and wait ten minutes to pay for a Mars bar and a pint of milk?

There is no need for that.

If the shop requires three confirmations to sell then you could be looking at thirty minutes to get a packet of cigarettes and I can't see someone craving a fix of nicotine waiting for that long.

What's being done to enable transactions as quick as a credit/debit card?

You can use 3rd party services for that, yes.

But you can also lighten up and accept the transaction as valid soon as it is broadcasted and the fees to the miners are paid. Shops take risks all the time when accepting other forms of currency. Credit card can be stolen, cash can be faked, etc.
9910  Local / Anfänger und Hilfe / Re: Bitcoinadresse = Wallet ? on: June 10, 2014, 04:25:36 PM
-snip-
Also gibt es zu jeder einzelnen Adresse einen Schlüssel, oder gibts es auch einen Schlüssel mit mehreren Adressen?

Zu jedem privaten Schlüssel gehört ein öffentlicher Schlüssel zu dem eine Adresse (hash des öffentl. Schlüssels) gehört.

Wenn Du also eine neue Adresse anforderst generiert Dir deine Wallet-App einen neuen privaten, öffentl. Schlüssel und erzeugt daraus die Adresse. Bitcoin-core macht das im vorraus, ob Mycelium auch schon welche vorberechnet weiß ich nicht.
9911  Other / Beginners & Help / Re: How to get Public Key in Multbit? on: June 10, 2014, 12:45:17 PM
No, I need the public key which is different than address. You need it for multisig and I have no idea what multisig even is.

So:

#1 start multibit
#2 let it sync (optional)
#3 go to tools -> export private key
#4 select dont encrypt and hit export private keys
#5 go to your multibit folder
#6 open multibit.key with a texteditor; this will look like this:

Code:
# KEEP YOUR PRIVATE KEYS SAFE !
# Anyone who can read this file can spend your bitcoin.
#
# Format:
#   <Base58 encoded private key>[<whitespace>[<key createdAt>]]
#
#   The Base58 encoded private keys are the same format as
#   produced by the Satoshi client/ sipa dumpprivkey utility.
#
#   Key createdAt is in UTC format as specified by ISO 8601
#   e.g: 2011-12-31T16:42:00Z . The century, 'T' and 'Z' are mandatory
#
KwifdhS1MVnGVPGEfcNJaubBLHLtmf7u9HtmXockXoirNfYzJmNY 2014-06-10T12:28:17Z
# End of private keys

now as you can see we have a private (!) key. You probably have more than one. Just make sure you dont post them somewhere on the internet if you even plan to use the address that belongs to that key.

#7 decode the base58 private key https://en.bitcoin.it/wiki/Base58Check_encoding
#8 follow the steps here https://en.bitcoin.it/wiki/Technical_background_of_Bitcoin_addresses to get your public (!) key
#9 do whatever you wanted to do with it Smiley
9912  Alternate cryptocurrencies / Mining (Altcoins) / Re: How to tell if GPU is damaged or dying or near end of its life? on: June 10, 2014, 10:21:55 AM
Thanks for the reply shorena.

The card's never produced any HW errors, I think I was quite conservative with the settings.

Regarding temps, from reading around, I thought anything under 80°C was ok.  I know lower is better, but it's been a struggle as it's getting warmer.  That's why I actually wanted to switch to mining X11 as it runs cooler.

Its a lifetime/power trade off. Below 80°C is ok, but a GPU is not going to last 5 years running 24/7 like that. This is especially true when the card had some minor issues from the begining, e.g. from production or transport.

I just tried something, and not sure what conclusion to draw now.  I unplugged the monitor from that card (which is in the primary 16x pcie slot), and plugged it into the card sitting in the 4x slot.  I'm actually not sure if this should even work or not (does the monitor HAVE to be plugged into the card in the primary slot), but regardless, I still couldn't remote desktop into it, effectively, it behaved the same as when the monitor was plugged into that card.  It booted, but hang, and was unresponsive.  It would respond to pings, but remote desktop would begin loading, but then hang too. 

Can you recommend a stress testing application?  I'll go and google it too.

Thanks again.

Well that sounds like its no a problem with the GPU maybe its the system memory? memtest86+ would be tool to test that.
9913  Alternate cryptocurrencies / Mining (Altcoins) / Re: How to tell if GPU is damaged or dying or near end of its life? on: June 10, 2014, 09:49:43 AM
Hi,

I've tried googling this, but haven't managed to find much on the topic.  I thought folks here might be able to offer some concrete tips and advice.

Basically, I'm suspecting one of the GPUs in my mining rig of being close to expiry, but have absolutely no way of really confirming (or disproving) this.  Are there any "tests", or anything I can do to at least fairly accurately determine the card is (or isn't) dying, or is it all pretty much undeterminable with any real degree of certainty?

Stress testing is the way to go. Since mining is basically stress testing you might up the intensity and see how many HW errors you get. Go lower with the intensitiy untill the card can run without or very few HW errors.

For info, the card is a Sapphire R9 270 (non-X), and it's only about 4 months old.  It has been mining nearly 24/7 in those 4 months, with temperatures between 75 and 80°C for 99% of the time, and just over 80, but not over 85 for literally a few hours in its entire life.

Sounds like bad cooling. Sure the GPU can take the heat but its not going to last long under these conditions.

Further info, the reason I'm suspecting the card (which is a primary card in my rig, with the monitor connected to it) is that, although it still mines stably, the GUI on this BAMT based rig often hangs, and I recently tried switching over to PiMP, and again, when booting up the rig from a freshly imaged brand new USB stick, the GUI just hangs for about 10-15 minutes, then sort of comes back to life, but it's still laggy and largely unusable.  Someone in the PiMP irc support channel suggested my card might be dying and that got me thinking if that really might be the case, and hanging GUI could be the symptom.  Find that odd though, displaying the GUI (in my non-expert opinion) should be a fairly basic and simple task for the card, far easier than mining, which the card can still do.

Thanks in advance.


Yes GUI is "easier" but thats not the matter. Usually the memory dies first and calculating the GUI uses the same memory as calculating hashes. Try cranking up the intensity and see how much the card still can handle. You also should improve the cooling.
9914  Other / Beginners & Help / Re: What is the path a Bitcoin makes from "Send" to "Receive" ? on: June 10, 2014, 07:59:46 AM
At what stage, does the prioritization occur, when people pay more, to get the transaction processed quicker?

The transaction will be in the next block if you pay 0.0001 per KB (which is done automatically by most clients anyway). If you pay more you are still in the next block, so it wont go any faster. Its not like miners can find a block faster just because you pay tripple default fee.

Before entering the blockchain?

Miners include transactions into blocks. They decide if your transaction will be in the block they try to solve. If they find the block they get the fee. So each miner/mining pool can decide which transactions to take and which not.

Hope I expressed myself correctly  Huh

Not sure, if not ask again Wink
9915  Other / Meta / Re: pls remove rating trust for me. on: June 09, 2014, 05:05:10 PM
yes i know . but i have message all no talk here . pls all member hepl me.

no
9916  Bitcoin / Armory / Re: Why use ubuntu on cold computer on: June 09, 2014, 10:08:37 AM
I'm in the same conditions as OP, but I 'd want to add a question, is ubuntu the best linux distro for cold storage?

Its just a Linux distro aiming at beginners. What would make a distro "the best for cold storage" in your opinion? IMHO the best would be a Linux that allready has all the wallets you might want to use. Thats not Ubuntu. I dont even know if it exists. But as fare as "I will do this myself" goes, Ubuntu is as good as any other Linux.
9917  Bitcoin / Mining / Re: Hash vs. Real Hash on: June 09, 2014, 09:33:23 AM
-snip-
Its running with CGMiner now at about 1GH/s, well, in fact it has 8 cores in it with each core running at 125MHz, so I know that each core is "hashing" at 125MH/s
-snip-

If each core runs at 125 MHz and can caluclate 1 hash per cycle your hash rate is 125MH/s. It seems however that the ICs you are using are not makeing a hash within a single calculation cycle.

Im not sure where your ICs find a shortcut in sha256 which is the only explanaiting I have to them something "solving" this faster.
9918  Other / Meta / Re: SSDD Hacked Acoount - Help on: June 09, 2014, 09:05:10 AM
why doesnt theymos respond to PM ?
he reads threads... but not PMs... kinda pointless.. perhaps we need someone who can read PMs and help ppl.

Im sure themymos read the PM. The PM however is missing something very important.

-snip-
I've checked before sending. Looks right.

-----BEGIN BITCOIN SIGNED MESSAGE-----
My account technomancer has been hacked/lost. Please reset the email to xxx@xxx.com. The current date is Jun 8 2014.
-----BEGIN SIGNATURE-----
1USDaf42U2ytrCqHVsC3uHmYHrdeA59B8
HG2j.........x.......x......x......x.....x....x.......................0Nspk3Zc=
-----END BITCOIN SIGNED MESSAGE-----

Also I used unique e-mail address. Not related with any bitcointalk account.

a reference that the address 1USDaf42U2ytrCqHVsC3uHmYHrdeA59B8 was used by the person who controlled the account in the first place. I can make a PM like that. Thats no proof that technomancer is my account.

The way this works is very clear. If you can prove with a single PM that you own the account you are fine. If you are unable to make this PM you make a new account. Technomancer, Bitcoinmafia and all the others that are whining and begging here currently are unable to make this PM. Why should theymos change the mail on those account if there is no proof?

Code:
-----BEGIN BITCOIN SIGNED MESSAGE-----
My account technomancer has been hacked/lost. Please reset the email to xxx@xxx.com. The current date is Jun 9 2014.
-----BEGIN SIGNATURE-----
13JtNLfPLwVmQg5sjdMkJb7d8RjDFtJb1D
IDcXWpU2CpzKTE5LnaLSHyB5t0tTAYC+GS6aTYM3FUIU3eah7+iGNVJ/4KbAuZiV0QjZ5b0ue+R58ABkMGKEcUI=
-----END BITCOIN SIGNED MESSAGE-----

Should I get that account now? No I shouldnt.

The message should look like this

Code:
-----BEGIN BITCOIN SIGNED MESSAGE-----
My account technomancer has been hacked/lost.
I used the address below
in this post https://bitcointalk.org/index.php?topic=137
and also in the PM with the ID 555
Please reset the email to xxx@xxx.com. The current date is Jun 9 2014.
Thanks in advance
-name
-----BEGIN SIGNATURE-----
1myAddress
mySignaturE=
-----END BITCOIN SIGNED MESSAGE-----

9919  Bitcoin / Armory / Re: Why use ubuntu on cold computer on: June 08, 2014, 05:41:41 PM
In an Armory tutorial on youtube Andy said he useing ubuntu. But not much into why he did it. When searching Im most finding installation problems. Perhaps I can do a better search. But how come its better to use it when even if the computer is cold?
A cold windows computer should be that secure as ubuntu?

I think the two main ideas behind this are:
#1 Linux is safer than windows and I want safe coins.
#2 Linux is hard, gimme the easiest Linux with a lot of support.

But as you pointed out for a proper airgapped system this is no issue. But why bother with windows when you can have a free (open source, no license for private use) system?
9920  Bitcoin / Bitcoin Technical Support / Re: If there was a 51% attack... on: June 08, 2014, 05:32:05 PM
-snip-
Thanks to both of you for your explanations.

The damage that can be done with a >50% attack is pretty big. It's a lot worse than I had originally assumed. I'm surprised it's not more of an issue in the community.

Keep in mind that this would hurt the overall bitcoin value. So it would also hurt the attacker(s). It is an issue within the community. People are allready worried that ghash.io might accumulate over 50% hashingpower. They are currently @ 39% according to blockchain.info https://blockchain.info/pools

Also keep in mind that the biggest pools are in fact pools. There are many many people hashing for ghash.io. According to their own info1 55% of their hashingpower is from individuals. They could easily switch the pool info in their ASICs and work for a smaller pool.

[1] https://ghash.io/ghashio_press_release.pdf
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