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1041  Economy / Service Discussion / Re: Coinbase business model on: April 19, 2013, 10:04:56 PM
The exchange cannot be manipulated by false orders.

I'm not sure I entirely follow.   There are people who have discussed emptying their bank account so as to cause the Coinbase ACH to get a return code for NSF, after buying at a higher level and then later seeing the BTC/USD exchange rate at a fraction of that level. 

That essentially is a fake order, and Coinbase then is left holding the bag on the expensive bitcoins the buyer bailed on.  Additionally, Coinbase incurs a fee I believe for that NSF.

So they definitely take a risk with their current model. 
1042  Bitcoin / Bitcoin Discussion / Re: Is Bitcoin Safe For Business? on: April 19, 2013, 10:16:29 AM

That discussion is incomplete without double spending attacks, especially if payment is recognized on 0/unconfirmed.
1043  Economy / Service Discussion / Re: I thought my wiki account was grandfathered regarding the anti-spam measures... on: April 19, 2013, 01:39:16 AM
My account at was created long before the paid anti-spam system was put in place, i could swear old accounts like mine that were in good standing had been grandfathered, but it seems it isn' i remembering things wrong or was there a decision to ungrandfather old accounts?

There's no grandfathering that I know of.

The payment for anti-spam protection by BitcoinPayment is 0.01 BTC, an amount now worth over a $1 which is higher than necessary to simply prevent wikispam.   
1044  Economy / Service Discussion / Re: MtGox - AUD -> USD? on: April 19, 2013, 12:38:04 AM
Obviously you cop a 0.6% fee each way in doing so.

In addition to the spread on each.  Though sometimes you can actually make a profit converting your AUD balance to USD ... just depends on what the order book looks like.
1045  Bitcoin / Technical Support / Re: Getting my head round it. on: April 19, 2013, 12:21:27 AM
Isn't that scary for people with huge amounts of coins.

Isn't what scary?  [Edit: Oh, ... your concern is over the address collision risk.  See below:]

1046  Economy / Service Discussion / Re: MT Gox AML No Response on: April 19, 2013, 12:06:39 AM
Can't help you with the AML questions, however:

Also is there an alternative to MT Gox to safely sell bitcoins and get the cash into fiat?

The factors that matter for any cash-out decision are:

 - Where are you located (country)?
 - How much are you looking to trade?
 - What type of cash are you looking to receive?
 - How soon do you need access to the proceeds?
 - Is privacy important?

A fairly comprehensive list of cash-out options is:

1047  Economy / Speculation / Re: The Weekend Dip Myth on: April 18, 2013, 11:00:40 PM
friday rally, then a weekend dip! get em while they're cheap.

Bah.  I think this myth is BUSTED.  It used to work.  There still might be conditions where it works.   It is not working now.

Buying back at over a 10% higher price sucks!
1048  Alternate cryptocurrencies / Altcoin Discussion / Re: A hard forked branch to accommodate bitcoin’s growth on: April 18, 2013, 10:05:13 PM
If coins are sent to an address in the new chain, they will remain in that chain.

Ha, nice try.   Delusional, but nice try.

The address is valid in both sides of the fork.  So let's say that somehow you trick me into spending my bitcoins that I received prior to the fork and pay using them to an address in your inflatacoin fork.  But then you can then use that exact same address on the Bitcoin blockchain side as well, broadcast my transaction there and receive the full value of the transaction there as well.

Participating on your side would be seen as the way to watch your bitcoins disappear.

Because there is no way to ensure that all transactions from the Bitcoin blockchain get into your inflatacoin fork, then the only time your chain becomes interesting to me is after my transaction confirms on the Bitcoin blockchain but where I've composed and sent a double spend of the UTXO used to your side of the fork, and then pay you with those funds which are now worthless on the Bitcoin blockchain.  That's a win / win for me!
1049  Bitcoin / Press / Re: 2013-04-18 FoxBusiness - Bitcoin Buzz Draws Western Union, MoneyGram on: April 18, 2013, 09:54:31 PM
Remittances go to pay for housing and for food and for maintaining your family," he said. "If you're sending to a rural part of Mexico, my guess is that the merchant is not going to be accepting bitcoins. They want pesos."
- Read more:

Yup.  But instead of having to go down to the Western Union agent location to pick some pesos up, you send a text to your friend's sister who buys bitcoins and pays pesos in exchange.   That person makes a little from each transaction.  Western Union gets about $8 + a vig on the exchange rate, so for a remittance transfer valued  at $100 the remittance recipient might get just $88.      With the person providing independently money exchange, that same transaction might deliver $94 worth and the person providing the exchange makes at least $5.  Sure that's not a lot of money but six of those a day and that person would be making more with this side job than from other employment options.

1050  Bitcoin / Technical Support / Re: Getting my head round it. on: April 18, 2013, 08:47:51 PM
I had 5000 coins, I put them into a cold wallet. If some how the cold wallet's address was the same as a wallet already online on someone's PC if they decide to make that wallet come online would all the coins on the cold wallet get transferred to the online wallet.

The way it works is confusing because the plumbing underneath is actually different from how it is presented.

Coins don't actually get held in a wallet.   The blockchain is a transaction ledger, and every full node with a blockchain has a copy of it.  The only thing in the wallet on your client essentially is the private keys that allow you to spend the funds for certain addresses.

Because people are familiar with the term wallet, since there is one in most back pockets and purses, that's what the clients try to emulate.   So the Bitcoin clients use the same concept of receiving and sending money as you have with a physical wallet for cash, but that's simply not what happens.

When you send a payment, you are simply broadcasting your permission for value to be transferred from previously received transactions to new bitcoin addresses.

When you receive a payment, that is simply the client showing a filtered view of the blockchain ledger for a specific address.

So yes, if someone has a private key from a cold wallet and that key is already elsewhere in an online wallet, either of those has the ability to spend the funds.  The network only cares which one spends them first.   The second attempt will be rejected as the funds have already been spent.
1051  Bitcoin / Bitcoin Discussion / Re: DDOS Payback on: April 18, 2013, 08:30:44 PM
Is this a real attack or just exponential traffic growth?


1052  Bitcoin / Development & Technical Discussion / Re: Forked block chain on: April 18, 2013, 08:04:09 PM
Your fork will have coins pre-distributed so you don't have the problems with early adaptors.

You might be overlooking the obvious. 

The spend transactions from the "pre-distributed"  coins would be valid on both sides of the fork.  Thus if bitcoin is trading at $90, let's say, and you are asking me to pay 10,000 ?TC for a pizza then I'm certainly not going to be using my pre-distributed coins and instead would only be using ones whose coinbase occurred post-fork.

And even putting that aside, you've got a fork that is extremely vulnerable to 51% attack.
1053  Economy / Service Discussion / Re: is offline, what's wrong? on: April 18, 2013, 07:38:46 PM
Everything should be back online now. Again apologies for the downtime.
1054  Bitcoin / Bitcoin Discussion / Re: Bitcoin circle image on: April 18, 2013, 10:47:30 AM
What do you think? Does it look too much like a cult because of the darker background?

Heh, the first thing I thought of:

The Carousel scene from Logan's Run (1976).  Renew!
1055  Economy / Trading Discussion / Re: What do you want from a better crypto exchange? on: April 18, 2013, 09:04:15 AM
  • Supports multiple cryptocurrencies (our initial goal is BTC/LTC/NMC/TRC)

You'll want to make sure you understand the risk of 51% with proof-of-work based currencies like Bitcoin and Litecoin.  The confirmation threshold for a merchant selling server hosting is one thing, the threshold for withdrawing bitcoins paid for using litecoins might be another.

I personally will not leave bitcoins with an exchange that has exposure to a Litecoin 51% attack.    I do not know if the exchanges that do trading between bitcoin and alts are taking additional precautions but an exchange wanting to grow market share (and revenue from fees) is more inclined to throw caution to the wind since it is primarily the customer's funds at risk to a 51% attack.   Preventative measures could be taken such as imposing a minimum delay before bitcoins purchased with Litecoin can be withdrawn, or daily limits such that if there is a Litecoin 51% attack, any losses are born from the exchange's reserves.
1056  Economy / Service Discussion / Re: is offline, what's wrong? on: April 18, 2013, 08:40:32 AM
Should not be long now until were back. Still investigating how the attacker was able to discover our real none-cloudflare IPs.
1057  Bitcoin / Press / Re: NEW articles in Press Forum on: April 18, 2013, 07:28:53 AM
2013-04-17 - Bitcoin exchange Bitfloor is no more
1058  Bitcoin / Press / 2013-04-17 - Bitcoin exchange Bitfloor is no more on: April 18, 2013, 07:27:53 AM
Bitcoin exchange Bitfloor is no more, has halted trading and promises to return user funds
Alex Wilhelm

If you are a Bitcoin advocate, fan, or users, this isn’t good news: bitfloor is shutting down. During the Great MtGox downtime and trading halt, smaller exchanges, such as bitfloor, provided valuable market liquidity. No more, for bitfloor.

Operations are kaput, and the company will “return all funds.” Users will undoubtedly be worried about their sums until the return safely to their normal accounts.

Bitfloor asks that its users “be patient” as it processes their cashing out.


Another article on it as well:

Bitcoin exchange BitFloor halts operations, shuts down
1059  Bitcoin / Press / Re: 2012-09-04 - Bitcoin exchange BitFloor shuttered after virtual heist on: April 18, 2013, 07:19:55 AM
Stop considering BitFloor!!

Related threads:

bitfloor issues?

bitfloor needs your help!

Bitfloor Shutting Down?

Bitflloor: " Trading will be suspended at 6 PM EST on 2013.04.17."

Bitfloor trading suspended

Bitfloor ceases operation reasons rumor/speculation
1060  Economy / Trading Discussion / Re: Bitfloor ceases operation reasons rumor/speculation on: April 18, 2013, 07:14:43 AM
I'm just curious to hear people's thinking.

Related threads:

bitfloor issues?

bitfloor needs your help!

Bitfloor Shutting Down?

Bitflloor: " Trading will be suspended at 6 PM EST on 2013.04.17."

Bitfloor trading suspended
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