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1041  Bitcoin / Development & Technical Discussion / Re: Private key Generation and how public key derived from Private Key on: April 25, 2013, 10:04:58 AM
1 - How is the private key generated?

Is really a random number of the ECDSA secp256k1 o it has an specific protocol and is not exactly a random number?

"In Bitcoin, a private key is a single unsigned 256 bit integer (32 bytes)."
 - http://en.bitcoin.it/wiki/ECDSA

Each client can create it differently. 

With Brain wallets a private key is sha256(passphrase).


   2 - How is the public key derived from private key?

Related:
 - http://bitcoin.stackexchange.com/a/1715/153
 - http://en.bitcoin.it/wiki/Secp256k1
1042  Economy / Service Discussion / Re: Quickest Way to get Dwolla into MTGox? on: April 25, 2013, 06:42:58 AM
Camp BX also takes Dwolla.  They don't require verification to deposit funds, if I remember correctly.

1043  Economy / Service Discussion / Re: Problems with en.bitcoin.it ? on: April 25, 2013, 05:51:43 AM
Any thoughts or comments would be helpful.

The wiki is hosted by Kalyhost (i.e,. by MagicalTux, same operator of Mt. Gox).

It appears perhaps that it is getting had been put on Cloudflare [Edit: For some time already, apparently]:
 - http://en.bitcoin.it/wiki/Main_Page

Further details will probably be discussed here:
 - http://bitcointalk.org/index.php?topic=160876.msg1935747#msg1935747
1044  Bitcoin / Bitcoin Discussion / Re: Best way to protect wallet? on: April 25, 2013, 01:47:29 AM
ok this is what I was wondering, whats the easiest way to make an offline wallet? I just read a how to using bitcoin qt to make it. Are there easier ways?

The answer to that depends on a number of factors.   Obviously, a person wanting to protect 10 or 50 BTC in an offline wallet has different requirements than a business protecting thousands.

Armory is so useful because it not only lets you prepare and use the wallet from an offlien machine, but it lets you create a spend transaction that you transport over to a connected machine and that is safe to spend.

Another method is to use a paper wallet from an offline computer using the .html from BitAddress:
 - http://www.BitAddres.org

The problem with that is when you want to spend you are generally importing the private key into a machine that is connected to the network, in order to spend the funds.  So that is a method that is somewhat less secure than the Armory method.  So maybe one solution is to create many smaller wallets se.g., 2 or 4 BTC each, so that the risk when redeeming is limited to just the one paper wallet being redeemed.
1045  Bitcoin / Technical Support / Re: Android phone (for authenticator) on: April 25, 2013, 01:41:02 AM
Or do these need to be reinstalled on the new phone?

Reinstalled.   Which means going to each site then disabling OTP (which requires the OTP from the old device) and enabling 2FA using the new device.

Some people store the secret for each OTP service in something like LastPass or in a document protected with GPG encyryption, for instance.  That way if the device is lost or reset to factory (e.g. before it gets sold) a new device can be prepped without having to go into each site to disable then re-enable the OTP.
1046  Economy / Trading Discussion / Re: Bitcoin - the bible - end times on: April 25, 2013, 01:13:25 AM
itr has been prophesied and anticpated by secularist that there will be a one world governemnt along with 1 currency.

A decentralized digital currency (or currencies) like Bitcoin would be the opposite of that then. 
1047  Economy / Service Discussion / Re: Is it possible that bitadress.org creates a Priv Key that dont match Public Key? on: April 25, 2013, 01:07:20 AM
As I said, is it possible that bitaddress.org creates private keys that dont match the public keys it generates?
It would be quite horrible if you sent a large amount of Bitcoins to an address with a faulty private key! I wonder if it is possible and/or has happened in the past that bitaddress.org, the program I am using for it has such a defect.

There was a bug with v2.1's vanity address code.  It was discovered fairly quickly and I'm not aware of anyone having lost any funds from it:

The fix is now live as part of v2.2:
https://www.bitaddress.org/bitaddress.org-v2.2-SHA1-d414530eea984e9ebdd40dc27af9078cd73dc3b3.html
 - critical bug fix to Vanity Wallet multiplication of a public key with a private key.
   Bug was due to incorrect construction of BigInteger object. Which results in the incorrect
   Bitcoin Address being displayed. Therefore, v2.1 has been taken offline.

Nobody has ever reported a paper wallet with the claim that the Bitcoin address didn't correspond to the private key.

You can check using BrainWallet:
 - http://brainwallet.org  <--- Click "Private Key" then paste.  Can be used Offline as well.
1048  Economy / Service Discussion / Re: My MTGOX account was hacked! on: April 25, 2013, 12:07:24 AM
I just got an email saying I made a withdrawal. I go log in and all $250 of my USD is gone!

Incidentally, they do have a method that is secure against this ... Yubikey, and Google Authenticator.

Happens a lot:

MtGox account got cleared out
 - http://bitcointalk.org/index.php?topic=85533.0

All BTC disappeared from my Mt. Gox account
 - http://bitcointalk.org/index.php?topic=88368.0

Another:
 - http://bitcointalk.org/index.php?topic=80562.msg941759#msg941759

And another: My mtgox account got compromised, what can I do?
 - http://bitcointalk.org/index.php?topic=84585.0

Yet more: MT.Gox account hacked - lost 2k USD - MT.GOX will not explain how.
 - http://bitcointalk.org/index.php?topic=89142.0

And more again: Bitcoins stolen from MtGox
 - http://www.reddit.com/r/Bitcoin/comments/x8lcv/bitcoins_stolen_from_mtgox

And yet more: Stolen from Mt.Gox coins. Help return the coins.
 - http://bitcointalk.org/index.php?topic=119816.0

Or more here: Email from Mt.Gox this morning.
 - http://www.reddit.com/r/Bitcoin/comments/z0na5/email_from_mtgox_this_morning

And even more here: I just had $715 stolen out of my Mt. Gox account.
 - http://www.reddit.com/r/Bitcoin/comments/12j9gi/i_just_had_715_stolen_out_of_my_mt_gox_account

And the biggie: Bitcoinica MtGox account compromised
 - http://bitcointalk.org/index.php?topic=93074.0

With more here: Unauthorized Account Activity on my Mt.Gox Account - Account Compromised/Hacked?
 - http://bitcointalk.org/index.php?topic=94140.0

And even more: *MY* Mt Gox Account was Hacked - lost it all today... now what!?
 - http://bitcointalk.org/index.php?topic=137795.0

Ditto: My MtGox account was just exploited - 3 BTC stolen
 - http://bitcointalk.org/index.php?topic=141816.0

Ditto on the ditto: Just lost 190 bitcoins through Mt. Gox
 - http://bitcointalk.org/index.php?topic=141831.0

And other ones get added to the list: Unauthorized withdrawal on Mt. Gox
 - http://bitcointalk.org/index.php?topic=147070.0

And then here: How I got robbed of 34 btc on Mt.Gox today
 - http://bitcointalk.org/index.php?topic=173227.0

And now this: My MTGOX account was hacked!
 - http://bitcointalk.org/index.php?topic=186422.0

And another recent one: My funds and BTC have just disappeared from my Gox account!
 - http://bitcointalk.org/index.php?topic=174556

And on other services as well. Here same thing happened to some GLBSE users:
 - http://bitcointalk.org/index.php?topic=84893.0

And elsewhere, BitMarket.eu in this instance:
 - http://bitcointalk.org/index.php?topic=5441.msg1259168#msg1259168

And on bitcoin.de as well: Bitcoins stolen from bitcoin.de.
 - http://bitcointalk.org/index.php?topic=130264.0


In none of these was the person using multi-factor authentication. Mt. Gox has had Yubikey support for a while. Mt. Gox accounts now support Google Authenticator:
 - https://mtgox.com/press_release_20120605.html

If the exchange you are storing funds with doesn't provide OTP, consider using a different exchange:
 - http://bitcoin.stackexchange.com/questions/4113/which-two-factor-authentication-methods-are-available-at-which-exchanges

If you are storing funds in an EWallet, consider using a paper wallet.

Also, here is a fantastic guide: How to use 2-factor auth on mtgox, even without a smartphone (from a second device, of course, not from the same computer you log in on).
 - http://bitcointalk.org/index.php?topic=111943.0
1049  Bitcoin / Bitcoin Discussion / Re: Is MLM ideal for bitcoin? on: April 24, 2013, 11:57:58 PM
I've thought about starting a wiki of how to run MLM style Bitcoin parties at home. If you have all the educational materials you need, it would be easy to sell them. There are already cash for gold parties like this.

What is being sold that would be an incentive to offer a party?  There's no residual income.
1050  Bitcoin / Bitcoin Discussion / Re: Is MLM ideal for bitcoin? on: April 24, 2013, 11:54:31 PM
A free membership provides shoppers with exclusive benefits from online shopping, gift card purchases,

From another thread:

Comments please good or bad idea?

I've done this transaction (sold bitcoins, withdrew Dwolla and used the funds to buy a gift card through Lyoness.us), and it worked fantastically.

The shipping and handling (S&H) for the card(s) is a $5 per order unless purchasing $300 or more of gift cards in which case the S&H is waived.

The order is sent FedEx.

So this is a 1:1 cash-out method.  You send $300 Dwolla USD you get $300 worth of gift cards in the mail.  The only cost in that instance is the $0.25 Dwolla per-transaction fee*
[...]
But remember, because this is using Dwolla to fund you can cash out at an exchange that uses Dwolla and this method does not require any withdrawal to a bank account.

Anyone in the U.S. can sign up for Dwolla.  You do not need to link a bank account to Dwolla to use this.
1051  Other / Off-topic / Re: Current state of affairs on: April 24, 2013, 11:36:25 PM
Does a merchant that uses a payment processor to convert revenues to fiat fit in there?

e.g., pass-through bitcoiner?
1052  Bitcoin / Bitcoin Discussion / Re: FinCen preparing to prosectute some Bitcoin users on: April 24, 2013, 10:48:29 PM
Excerpt:

If you are going to give your interpretation as well then you might want to edit that to make it more clear what is the original FinCEN content being excerpted. (quotes, italics,  line spacing, ...  all are tools available to help distinguish the two.)
1053  Other / Beginners & Help / Re: I made a Dr.Evil Paper Wallet Generator on: April 24, 2013, 10:38:57 PM
Would love to hear any suggestions you might have

There's no text printout of the private key (redeem) or Bitcoin address (load & verify)  in case the QR code cannot be scanned.

Oh, scratch that.  it was just not rendering when I had saved the image.   It would be on the printout.
1054  Bitcoin / Project Development / Re: New wiki admins wanted on: April 24, 2013, 10:30:25 PM
I don't know how many people we can elevate to the admin status (currently only MagicalTux holds the rank of beuaorocrat and can appoint new admins).


Speaking of, ...

the WIki is down at the moment.   Mysql error.

MagicalTux (Kalyhost ?) is still hosting the site.

I believe at one time this was explained as something beneficial because it receives the benefit of having DDoS protections from this hosting affiliation.  (as the BitcoinTalk forum also was hosted there).  

I've no idea about the current hosting configuration nor if there are plans for Bitcoin Foundation to take over hosting.

Just wanted to share info as far as how the hosting for how it exists today.

[Edit: It appears the site is getting put on Cloudflare now has been hosted through Cloudflare for some period of time already, apparently.]

[Update: The wiki is back online now.]
1055  Bitcoin / Technical Support / Re: What happens to unconfirmed transactions? (blockchain.info) on: April 24, 2013, 10:11:13 PM
This would make bitcoin unusable for micro payments.

Bingo!

At the time the logic was developed, a 0.01 BTC payment was a "micro transaction".  Now at an amount over a dollar fifty, there are payments which that you'ld think would not be considered micro transactions but the network does consider them as micro transactions.

Paying a fee resolves that.

The Bitcoin-Qt/bitcoind client would have insisted on a fee in this instance.  Blockchain.info/wallet ...  not so much.
1056  Bitcoin / Technical Support / Re: What happens to unconfirmed transactions? (blockchain.info) on: April 24, 2013, 10:09:11 PM
It has been over 30 hours since that transaction was submitted. Is it possible that it can still be confirmed?

Well, the transaction won't even be relayed by the Bitcoin-Qt/bitcoind client because it has an output below 0.01 BTC.

If you had made this transaction from the Bitcoin-Qt client, it will continue to try to re-broadcast the transaction, maybe hourly, and presumably eventually it would reach a miner directly and eventually get mined.

Blockchain.info/wallet doesn't seem to re-broadcast indefinitely.  It seems to abandon a transaction after a certain period of time passes and the transaction doesn't get a confirmation.    The transaction then disappears from blockchain.info/wallet as if it had never been made.

If you need the fund, you could import the private key that spent the funds to another client and try to spend the funds that way.  Of course, that is a double spend and all the other transactions you made using that coin or any children transaction would instantly become invalid.

1057  Economy / Gambling / Re: 1 BTC Freeroll Tournament - Come Test Our New Bitcoin Poker Room on: April 24, 2013, 08:50:43 PM
when I try to download the client I get an error!

Installing an executable from an untrusted source?

Good luck with that.
1058  Alternate cryptocurrencies / Altcoin Discussion / Re: I will create a forked bitcoin chain on: April 24, 2013, 08:45:53 PM
The easy solution is to just send your coins to yourself. This will push them past the fork on the LinearCoin chain.

There's no difference between an address created using Bitcoin-Qt/bitcoind versus inflatacoin LinearCoin.  So me sending to my own address is a transaction valid on both chains.  

So the private keys in my LinearCoin client would be as valuable to an attacker as my Bitcoin-Qt/bitcoind wallet.dat.

I personally am not a thrill seeker who jumps off bridges tethered by a bungee nor does playing Russian roulette appeal to me.  Trying to use LineaCoin without losing my bitcoins seems like an equal challenge.
1059  Economy / Web Wallets / Re: Blockchain.info - Bitcoin Block explorer & Currency Statistics on: April 24, 2013, 08:18:09 PM
Changes to Alias Resolving

When a wallet is accessed using an alias if the browser does not already have the wallet identifier saved or have an authorised login session email authorisation will now be required.

I'm not sure this is working.  On a new browser with no cookies or other local storage (Chrome in icognito mode) I enter my alias for Identifier.  The page is reloaded and the ID field remains blank.  Then in another tab I go to Blockchain.info/wallet and there is my identifier.   So the challenge is defeated somehow.
1060  Bitcoin / Bitcoin Discussion / Re: FinCen preparing to prosectute some Bitcoin users on: April 24, 2013, 12:40:36 PM
I am planning on donating to Freebanking.org as a sort of insurance (and big Thankyou).

If you figure out a way to donate using bitcoins, please share.  I only saw PayPal.
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