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1481  Economy / Economics / Re: Deflation and Bitcoin, the last word on this forum on: July 07, 2011, 11:51:21 PM
"Inflation is always and everywhere a monetary phenomenon." - Friedman, Milton. A Monetary History of the United States 1867-1960 (1963).


Perhaps some econ guru can clear something up for me. In 2008 the supply of dollars M0 most certainly went way up. However at the same time (in some cases before) the price in dollars of hard commodities such as silver, platinum, and crude oil (not gold) dropped significantly. That seems counter intuitive to me and contradicts the seemingly obvious idea that monetary inflation generally effects price inflation.
1482  Economy / Economics / Re: Deflation and Bitcoin, the last word on this forum on: July 07, 2011, 11:25:12 PM
Wikipedia claims that the gentlemen below state in their glossaries that...

In economics, inflation is a rise in the general level of prices of goods and services in an economy over a period of time.

Abel, Andrew; Bernanke, Ben (2005). Macroeconomics (5th ed.). Pearson

Barro, Robert J. (1997). Macroeconomics. Cambridge, Mass: MIT Press. p. 895. ISBN 0-262-02436-5

Blanchard, Olivier (2000). Macroeconomics (2nd ed.). Englewood Cliffs, N.J: Prentice Hall. ISBN 013013306x

Burda, Michael C.; Wyplosz, Charles (1997). Macroeconomics: a European text. Oxford [Oxfordshire]: Oxford University Press. ISBN 0-19-877468-0
1483  Bitcoin / Development & Technical Discussion / Re: Pattern of Transaction in Blockexplorer on: July 06, 2011, 05:54:06 PM
Quote
But how likely would it be that the recipients would ALL have their addresses start with the same prefix of "1Kr"  Huh   Huh

...issuing New Icelandic Króna backed by Bitcoin.
1484  Bitcoin / Development & Technical Discussion / Re: Instant payments made easy on: July 06, 2011, 05:33:43 PM
The only one who could "outrun" me is the instant wallet service.

Fair enough, we don't trust consumers, but we can trust Instawallet Inc because they have a physical address.

Seller and buyer have a strong motivation to use an instant wallet service that is well-known and has a good reputation.

And the wallet service protects your bitcoins, loans them out, and even pays interest. Fantastic!

The only use case I can come up with for this is my trek across the arctic or sahara sans computer, batteries, whereby I might need to use bitcoins in some village, where of course they exclusively use bitcoins.
Think vending machines. A banknote-accepting reader would be easily modified to read this thingy.
But of course, as long as you have a smartphone, it really is not necessary, i totally agree.

Certainly coins and paper money are convenient. I'd much rather a bitcoin-mint printing counterfeit resistant coins with an address that I can confirm online. Your proposed system has only practical value early in the adoption curve. Passive debit cards and accounts would give everything you require except the fear of centralization, fractional reserve, etc, which few people care about, certainly not in comparison to the convenience of a small vending machine purchase.
1485  Bitcoin / Bitcoin Discussion / Re: Potential attack vector in generating Bitcoin addresses? on: July 06, 2011, 05:16:24 PM
If you collide an address, you don't have to do it with the same ECDSA key that the owner used.

That's interesting. I wonder why we don't just use the full 256 bit public key as the address (not hashed) -- and then use the 'first bits' rule in the every day.
1486  Bitcoin / Development & Technical Discussion / Re: [RFC] When wallets conflict with the block chain on: July 06, 2011, 05:12:10 PM
The shortcut, maybe-good-enough-for-now solution:  export all the private keys from all the messed up wallets.  Start with a clean wallet, then re-import all the private keys and let the clean-slate bitcoin figure it all out.

I would have assumed that's what --rescan would do. Throw away all block references and scan every address for it's balance record in the block chain.
1487  Other / Beginners & Help / Re: HOWTO: create a 100% secure wallet on: July 06, 2011, 04:22:50 PM
Careful what version of Bitcoin you use! Some versions will display multiple addresses but the private keys won't be made till you do a transaction and have it open for a while!!! Someone did something similar, where they sent some to the first address as a test then saw it worked then send the rest to the second address. Deleted everything only to go back and see that he lost his BTC!!

Bitlotto are you talking nonsense, misunderstood the use case, or trolling?

There was a time when keypool=100 was not default and so restoring from backup would loose the change and receipts since backup. But that is no longer the case (and was fixed by Satoshi long ago). If you insist there was EVER a version that presented an address (a hash of a key) before creating and storing the private key, I would like to see the source code in the git repository.

EDIT: Clarification to this point last month: http://forum.bitcoin.org/index.php?topic=17240.msg222709#msg222709
1488  Economy / Marketplace / Re: 9.7BTC for the taking! Bet on bitcoin future price here (July 1st, 2011) on: July 06, 2011, 02:11:55 AM
Looks good to me:
http://blockexplorer.com/address/1945qfobZxdnmVJ6qBd4FgcVcWBhDXKiTV (Betting pool)
http://blockexplorer.com/address/16eg1Qs15Vq7mvpi2fPNQuYzBkhp5DhzNq (payout 5.72 btc)
http://blockexplorer.com/address/1NsvfVxNHzoz484aTSeutayTwGi6VQmqYL (payout 3.84 btc)
1489  Bitcoin / Bitcoin Discussion / Re: Shout Out To AnonX For The 37.5 BTC Fo' FREE on: July 06, 2011, 01:53:41 AM
stay classy bitcoin.
I honestly think this whole forum is full of fucking thieves.

I assumed you were all taking the money to return it in PM. But you so gleefully fuck each other. I'm ashamed to be a member of this community of geeks, libertarians, and thieves.
1490  Bitcoin / Bitcoin Discussion / Re: Potential attack vector in generating Bitcoin addresses? on: July 05, 2011, 11:16:07 PM
So, I was thinking about the address generation scheme that is used for Bitcoin. Please note I did not do any math here yet to see if it is likely to happen, it's just a concept.

From what I understand, the keys are 256 bits (10^77) and there are what? 1 billion keys?

http://en.wikipedia.org/wiki/Birthday_paradox
http://en.wikipedia.org/wiki/Universally_Unique_Identifier#Random_UUID_probability_of_duplicates

1-e^(-(n^2)/2x)

EDIT:

1-e^(-(1000000000^2)/(2^256)) =
1-e^(-(10^18)/(10^77)) =
1-e^(-1/(10^59)) =
10^(-60)

Current Block Probability: ~ 10^(-16)

So, getting the block is 10^45 times more likely than a single collision. An attacker would have to hope for colliding with wallets containing trillions of times more coins than will ever have been created. But if an attacker can change the value of 'n' to 10^39 (duodecillion attempts) then he'll likely be quite profitable... but then again he'll only be colliding with his own keys.

1491  Bitcoin / Bitcoin Discussion / Re: an idea for easy two-factor authentication (Attn: Mt.Gox) on: July 05, 2011, 10:23:57 PM
I'm making an app on google's appengine and was considering using OpenID for user authentication....researched it quite a bit, but openid on appengine dont work with https... so that kicks that idea to the curb for now.

Google's own implementation of openid works on appengine https, but you require a google account....

Let us not call Google or Facebook authentication OpenID. They both are OpenID providers, but not consumers. No one wants twenty disparate OpenID's. Users want one (or many that they have 100% control over). In other words, Google and Facebook will let you login to other sites with your Google or Facebook id, but neither will let you login to their own sites with other identities.

I bet at least 50% of my potential users would run away if they needed a google account to log into my site.  What do you think?

As much as I like Google, using their authentication method for money gives me the willies. Depends on what your plans are. Maybe it's just a proof of concept and you can take it from there.
1492  Other / Off-topic / Re: Stevia and Bitcoin, the two most controversial topics. Which is the 3rd ? on: July 05, 2011, 10:09:43 PM
Big Pharma lobbies to keep Stevia surpressed because it is natural, healthy, and sweet.  No real controversy here, just greed.

How is that not a controversy?

It could, and maybe should, be a controversy. But it is not. Few know or care.

con·tro·ver·sy [kon-truh-vur-see; kuhn-trov-er-see] a prolonged public dispute, debate, or contention; disputation concerning a matter of opinion. contention, strife, or argument.
1493  Economy / Economics / Re: Price for 2011-07 on: July 05, 2011, 08:50:24 PM
And why, please write why.

BTC must go beyond $35 so I can buy silver for the ladies.
1494  Economy / Economics / Re: What can we expect the price to decline/raise to? on: July 05, 2011, 08:24:19 PM
If it does continue to slide all the way to 0 (which I highly doubt) I will be slightly sad that a great experiment brought a negative result.

No more no less.

The great experiment will bring a negative result if the markets go below 0
1495  Bitcoin / Development & Technical Discussion / Re: [RFC] When wallets conflict with the block chain on: July 05, 2011, 07:51:23 PM
Sipa just pointed me to this thread after I posted http://forum.bitcoin.org/index.php?topic=26269.0

The transaction in question is now over a month old. I have two versions of the same send in my client (neither send happened). The first send has 7000 confirmations sent to no (blank) address. Another send (with the same timestamp and btc amount) has 0/confirmations to an unknown address in the block chain (presumably an address of mine somewhere).

I believe the one or two transactions are invalid due to double spending from a copied wallet but it's difficult to confirm because I can not be sure which are the sending nor receiving addresses. In any case, I would hope that before 7000 blocks the 0.3.23 client would be convinced that the transaction is never going to happen.
1496  Bitcoin / Development & Technical Discussion / Re: Launch of BitPay, worlds first smartphone-ewallet for bitcoins on: July 05, 2011, 07:21:50 PM
This is great news. I wish you luck with the project. May I suggest you accept firstbits.com minimal/unambiguous/case-insensitive addresses?
1497  Bitcoin / Development & Technical Discussion / Re: Instant payments made easy on: July 05, 2011, 06:55:51 PM
No version proposed is practical nor instant. The recipient would have the same burden of confirmation/trust as today. There is nothing preventing the 'sender' from racing the recipient to cash out the instawallets. And with dozens of transactions required, I'd just as soon trust a 0/confirmed transaction or just wait ten minutes.

Expecting the use of the same service is not bad. If I could easily transfer from your instawallet/mybitcoin to my own account immediately, then that's great. If we don't both have instawallet/mybitcoin accounts, fine, I just have to wait for confirmation or trust you.

A different approach would use a system similar to instawallet whereby passwords could be easily changed. The sender gives the password to the recipient who changes it. Now we move the burden of trust from the sender to the service.



The only use case I can come up with for this is my trek across the arctic or sahara sans computer, batteries, whereby I might need to use bitcoins in some village, where of course they exclusively use bitcoins.
1498  Bitcoin / Development & Technical Discussion / Re: Patching The Bitcoin Client To Make It More Anonymous on: July 05, 2011, 06:42:11 PM
Hey guys I'm interested in getting people's thoughts on this.

- see all addresses, including change

- see which addresses are linked together (does recursive expansion of address linkages)

- select which address(es) to send from, rather than letting the client to chose for you

http://www.youtube.com/watch?v=TA_O6Boi7Xo

So what can you do about this? If you don’t have any Bitcoin yet then you can just make sure to use separate wallets for addresses you don’t want being mixed together.

That’s why I’ve made a patch to the official client which allows you to send from _only_ a single specific address.

I’ve added a ‘Send From Address’ tab to the main interface. It actually contains information which was impossible to get from the client before. That is, every address in your wallet and the balance thereof. This includes addresses which were created for the change of your outgoing transactions.

YES with a capital FANTASTIC!

I'm not even trying to be anonymous, but I still have a dozen wallets to keep track of 'accounts'. These patches bring us a long way toward personal financial control. I'd like to similarly be able to right click on a group of linked addresses and export them into a separate wallet... (as well as import wallets). I'm very happy to see all addresses, whether used in a transaction or not! Perhaps the ability to generate 'x' for the keypool buffer (and maybe delete unused addresses) would be handy.

I look forward to seeing your patch in the mainline along with encrypted keys!

Muchas gracias!
1499  Bitcoin / Bitcoin Discussion / Re: an idea for easy two-factor authentication (Attn: Mt.Gox) on: July 05, 2011, 06:21:41 PM
International mailings are slow, expensive and barely reliable. This is something your local bank might be able to do, but not Mt. Gox or Tradehill.

I would like to see more federated authentication (OpenID). Then, whether we authenticate with PGP or mailed TAN, we can use the same authentication token for many services in the bitcoin community. Services like OpenID haven't taken off due to the chicken-egg problem. Well, we're a huge clutch of chickens! let's lay some eggs.
1500  Bitcoin / Development & Technical Discussion / double spend attempt, client none the wiser on: July 05, 2011, 05:54:12 PM
Early last month, while trying to understand keys, wallets, security, and backup, I believe I inadvertently attempted to double spend. The client is not handling it gracefully (the UI displays two semi-duplicate transactions neither of which occurred and a zero balance even after thousands of blocks). While I am not entirely sure about the order of events, I believe the following steps might be correct:

I created a wallet (A), received coins, sent coins, closed client.

I copied wallet, rescanned with new copy (B), and sent the same coins to different addresses.

Now, when I open wallet A, I see a transaction sent to <blank> address with almost 7000 confirmations. In the new client I ALSO have a similar transaction sent to an address not known to the blockexplorer with the exact same June timestamp but with 0/unconfirmed.

While I would like to think the coins are still available to me, I believe they were actually sent (from the copied B wallet). I'll be happy to disclose the addresses in question to client developers (PM me) in order to improve the client transactional log.

--

But aside from this odd behavior, it highlights the need for more address transparency. I can not see to what address the transaction is sending (abnormal), nor can I see from which address the coins are coming (normal). In this case, I can guess at the sending addresses because I've received with a limited number of addresses. I do not know what addresses are 'hidden' in my wallet, and therefore do not know whether wallet A is a pure subset of B and can thus be deleted.

My personal feeling on the UX matter is to think of and display addresses as accounts and a wallet as a portfolio. I think the wallet metaphor creates confusion.
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