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9
votes
1answer
259 views

Block messages with transactions hashes instead of full transactions

When a bitcoin node has the blockchain in sync, most transactions in incoming block messages may have been already received as standalone tx messages before. With a block message with only ...
28
votes
1answer
14k views

Signing Bitcoin transactions

There is a part of the Bitcoin protocol that I don't quite understand. When you make a transaction, and spend the output of a previous transaction for say 1 BTC, you provide a signature using the ...
2
votes
3answers
786 views

Is the minimum amount of money required to purchase >50% hash power equal to max worth of all existing bitcoins?

20 BFL Bitforce Mini Rigs (each, $30k) will give about 30THash/Sec hash power for $600k. That's way above 60% of hash power of then total 51THash/Sec. 10.694M total Bitcoin * $18.5 current mtgox best ...
0
votes
1answer
417 views

How long does it take for Mt Gox withdrawal to Dwolla?

I just sold some BTC and transferred money from Mt Gox to Dwolla. My Mt. Gox account had $150 in it, and now both accounts are zero. Is it normal for neither account to reflect the new balance after ...
34
votes
5answers
11k views

Bitcoin Mining ASICs used for cryptographic application? Rainbow tables?

What is the potential that the ASICs being developed for mining could be used for other cryptographic applications such as building rainbow tables? I know that for instance those that crack GSM with ...
2
votes
2answers
292 views

Are all trades stored in block chain?

Are all trades stored in block chain? Are all trades, like mtgox exchange, gambling, etc. stored in block chain? Or, few trades could have been skipped / ignored? Consider this case, 'a' transfers ...
5
votes
2answers
358 views

How would Bitcoin usage be affected within a country that severed its Internet connection?

Clearly this system depends upon data exchange. What happens if national authorities in one or more countries decide there exists a "national emergency", "requiring" the shutdown of the internet in ...
1
vote
1answer
80 views

Where is the part in code related to the installation on Linux/Mac and windows?

Where in the source code is the part related to the GUI and platform depended installation?
21
votes
3answers
5k views

How does Satoshi Dice's 'zero confirmations' transaction system work technically?

The popular bitcoin betting game Satoshi Dice sends back payments very fast, they don't wait for confirmations. The user sends money to Satoshi Dice and gets back winnings a couple of seconds later. ...
5
votes
1answer
211 views

What if the system crashes if I have made transactions after my backup?

Suppose I have a recent backup of my wallet.dat file. Now I make (say) two transactions: one receipt and one send. Before I run my next backup, the hard drive crashes and I lose wallet.dat. I can ...
2
votes
1answer
263 views

Are there studies about a Bitcoin-like economy with inflation?

Assume, we create an alternative cryptocurrency ("InflationCoin") based on the bitcoin software with one change to the protocol: The Block reward is constant, e.g. 50 InflationCoin Technically this ...
1
vote
1answer
4k views

Is it possible to trace fraud committed via a service the bridges banking and bitcoin?

Consider the following scenario: An individual, the "buyer" buys something online from someone else, the "seller". The buyer cannot verify the identity of the seller. The seller wants money upfront ...
4
votes
2answers
7k views

Buy bitcoins using google checkout

I want to buy a small amount of bitcoins using google checkout. Any service provider ? Thanks
5
votes
1answer
238 views

What can happen if/when a node is surrounded by rogue nodes?

If a node (V) accepts incoming connections, is he vulnerable to becoming completely surrounded by corrupted nodes? Would an attacker be able to control which transactions are relayed to V and which ...
7
votes
3answers
5k views

Why does Mt Gox disallow YubiKeys purchased direct from Yubikey.com?

I have several Yubikeys and would like to use one or more with MtGox.... however it seems that I can only use keys purchased from Mt Gox on their site. Why did Mt Gox choose to implement security ...
11
votes
4answers
6k views

Is there a way to not pay the transaction fees when using the standard Bitcoin client?

I tried sending one satoshi (0.00000001 BTC) to one of my friend and the client always showed a dialog prompting me to pay 0.0005 BTC in fee, with the only options being OK (pay the fee) or cancel (...
2
votes
2answers
285 views

Why does bitcoind (0.7.2) give an error when trying to issue getrawtransaction over RPC?

I am writing an web application using Python/Flask. I am using http://laanwj.github.com/bitcoin-python/doc/ to connect to my bitcoind 0.7.2 server as follows: conn = bitcoinrpc.connect_to_local() ...
-2
votes
2answers
271 views

Will it be possible to buy shares online using bitcoins in a financial market?

Do you foresee people one day people trading securities,bonds,stocks or currencies with bitcoins.I would like to buy a share lets say from Microsoft with bitcoins and have the value of it remain in ...
5
votes
4answers
1k views

Securing bitcoin addresses in database

I'm working on a service which will require me to store bitcoin payout addresses in my database. This means that a potential attack to my service would be to gain access to the database and replace ...
2
votes
1answer
643 views

Sending funds via routing number from bank

Is it possible to send funds from a bitcoin account via routing number to a trading account?
0
votes
2answers
780 views

How To Use BitPay

We have a online computer company written in PHP www.cworld.com.au A sister site we have uses Magento How can we use BitPay to enable our site for BTC..Is there an API Can we get paid for every ...
3
votes
2answers
753 views

Is there any useful documentation on using the MtGox API with node.js?

I have been looking for some help building a platform using node that works with the MtGox api. It seems easy to make request, but I am confused about how to pass a parameter. Right now my code ...
6
votes
3answers
2k views

How to know when a payment has been received by bitcoind?

I want to create a website which involves the creation of a new single-use address that a user would send bitcoins to. I'd like to know programmatically when the user has sent bitcoins to the address ...
-2
votes
2answers
273 views

Are there any canadian institutions backing bitcoin?

I'd love to know if there are.
0
votes
1answer
2k views

Bitcoin-Qt client: Easy way to using a wallet.dat not in its default location/when it asks for my password at all?

It doesn't have to be called "wallet.dat", right? That would be too obvious. Can you call it anything, with any extension? Bitcoin-Qt is just not so trivial to me to use since the trivial way would ...
2
votes
1answer
343 views

Optimizing fee payment for speed or zero fees/privacy? (Clients vs. e-wallets)

As far as I understand the more fees you pay, the faster the delivery. What I don't understand is fees are given to kilobytes of data, not amount of money. Maybe here would come handy a little deeper ...
3
votes
0answers
83 views

What are some resources that analyze “how centralized Bitcoin really is”

Are there any blogs that track the centralization in Bitcoin? Is it growing, or is Bitcoin becoming less centralized over time? E.g. I believe mining pools have become somewhat less centralized in ...
0
votes
2answers
2k views

Best way for anonymous purchases (for small amounts only) with credit card or Paypal if you have Bitcoins to spend? Bitcoin-OTC? No name credit card?

Obviously if you are American or you live somewhere where you have the opportunity to just buy a Visa (or Mastercard) gift card in a store for cash: you can't go better than that. But I don't have ...
-1
votes
1answer
167 views

Are the original Bitcoin Qt client's developers around and can we ask them to consider a portable version? [duplicate]

Possible Duplicate: How to Make Bitcoin QT Client Portable? (Windows) That is my conclusion. It's better to experiment for myself that asking all these questions I have to restrict myself to ...
5
votes
1answer
282 views

Understanding speed vs. fees on various wallets, esp. Instawallet and original client

The Bitcoin Wiki don't say much about fees, more precisely if you have a choice between speed vs. fees (pay more, deliver faster). In fact, I don't yet even have a clue how fast are bitcoin ...
-1
votes
1answer
320 views

Bitcoin Step by Step [Kindle Edition] by Michael Caughey - worth buying? [closed]

Courtesy of bitcointalk.org fame. Sure, the Internet is full of free info but some time it might worth to pay for information, doesn't it? The funny thing is that he only sells it as a DRMed Kindle ...
0
votes
1answer
200 views

How can you operate a fractional reserve e-wallet?

There are topics about the possibility of e-wallet providers operating like fractional reserve banking. How it can be done in theory and practice? Did it ever happen on any meaningful way in Bitcoin'...
5
votes
1answer
2k views

Can I synchronize the blockchain on one computer then transfer the files to another? [duplicate]

Possible Duplicate: Would it be possible to provide a downloadable blockchain that is updated and verified by a mass of people? If I install and synchronize the official Bitcoin wallet, can I ...
3
votes
1answer
148 views

List of problematic blocks [closed]

Is there a list of problematic blocks? I mean blocks in official blockchain that may cause carelessly written bitcoin client to stuck after receiving them? Can you provide a link for further reading ...
20
votes
2answers
10k views

How will multisig addresses work?

How will multisig addresses work? Will they consist of multiple traditional addresses, or will they have some different structure? Will one be able to specify whether they will require 2 out of 2, 2 ...
0
votes
1answer
668 views

Ways to buy bitcoin (I'm in the US) [duplicate]

Possible Duplicate: How do you obtain bitcoins? I just want a straightforward answer, I read a few answers but the explanations are convoluted. Where can I buy bitcoins online? Is there a site or ...
8
votes
4answers
449 views

Is this an ok “poor man's 2 out of 3” key solution?

In the situation that you want no individual to have the complete private key, but you do want to share the complete key between 3 individuals, of which any 2 can construct the complete key, what is ...
2
votes
4answers
13k views

What is the maximal value of 1 BTC? [closed]

If all of the world suddenly decided they want to use BTC as their currency, what would the value of 1 BTC be, as measured in today's US dollars? (Of course dollars would drop to zero in this ...
9
votes
5answers
1k views

Can I create a deterministic wallet and export/disclose indiviual keys without compromising the wallet?

Scenario: Create a deterministic wallet and a larger number of private keys and associated bitcoin addresses on a safe (e.g. offline) computer. Backup the seed securely. Store the private keys ...
4
votes
2answers
1k views

Chronological list of transaction ids

Is there a way to get a list of the latest transactions IDs? I know I can watch incoming transaction almost live on http://blockchain.info, but is there a way to download the last 10.000 transaction ...
2
votes
1answer
156 views

Is there a way to create decentralised rating system akin to #bitcoin-otc?

I'm wondering if there is a way to create a ranking system similar to #bitcoin-otc, but making it decentralised?
0
votes
1answer
619 views

Which framework is best for eWallet bitcoin development? [closed]

What are the advantages/disadvantges of various web frameworks like Django, Ruby on Rails, Flask, etc when it comes to Bitcoin? Are some better at interfacing with the daemon than others? Do some ...
5
votes
1answer
361 views

Does the .bitcoin directory shrink in bitcoin-qt 0.7.2 and later?

The bitcointalk.org thread "Ultraprune merged in mainline" implies that a more efficient way of storing block information was introduced. Will this make the .bitcoin directory smaller after an upgrade ...
5
votes
1answer
365 views

How do Javascript-based wallets generate random numbers and is this cryptographically secure?

Hybrid wallets and some paper wallet generators create private Bitcoin keys using Javascript inside the browser. Which source of entropy do they use? How do they make sure the PRNG is suitable for ...
11
votes
2answers
5k views

Why must some bitcoin clients download the block chain and others not?

What does it mean that some Bitcoin clients download the entire block chain (all transactions ever happened) and others not?
58
votes
8answers
38k views

What effects would a scalable Quantum Computer have on Bitcoin?

A scalable quantum computer is a quantum computer that is easy to extend - adding more (q)bits of memory is not a fundamentally hard problem, and will happen. Or, alternatively, that it follows Moore'...
3
votes
2answers
2k views

What is the total number of Bitcoin transactions processed so far? [duplicate]

Possible Duplicate: How many transactions have been included into the blockchain? The question explains itself.
16
votes
4answers
4k views

Cannot access my bitcoins because my wallet is still synchronising. What can I do to spend them immediately?

I have purchased bitcoins and have downloaded Bitcoin-QT, but my wallet is taking forever to synchronize to the network. I can't access my wallet because it is still in the sync process. I have the ...
6
votes
9answers
6k views

Anonymous Domain Registrations [closed]

Can anyone recommend a domain registrar which will both accept BTC and allow anonymous registrations? I'm aware of this list: https://en.bitcoin.it/wiki/Trade#Domain_Name_and_DNS_Hosting But was ...
7
votes
1answer
656 views

How much Bitcoin was lost in the Jul. 2011 MyBitcoin site shutdown incident?

https://en.bitcoin.it/wiki/MyBitcoin How much money was lost when it shut down? (You can also edit the wiki page and add this info). Best estimates of course.

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