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9
votes
3answers
491 views

How can I assure my consumers they are actually paying the correct person? (prevent MITM attacks)

There are many network level attacks that give someone Man in the Middle ability to replace my Bitcoin address with their own. Since there is no way to cancel a transaction, and the best practice ...
4
votes
2answers
781 views

Is there a point to vanity addresses if a new destination address should be created per sender?

There is some advice for merchants to have a unique Bitcoin address for each incoming address. Apparently this will help associate a transaction with a sender. Since it can take a long time to ...
5
votes
1answer
756 views

Bitcoin mixing and transaction sizes

I'm pretty clear on how a Bitcoin mixer obscures transaction history, but I don't understand how an observer is not able to reasonably link the source and destination wallets simply based on the ...
3
votes
2answers
279 views

How many coins are needed to ensure stability i.e. neither inflation nor deflation?

The key to currency stability is to have neither too many nor too few of a currency in circulation. So what is the "Goldilocks" area going to be if Bitcoin really catches on and everybody wants to use ...
3
votes
1answer
4k views

What does a Bitcoin transaction consist of?

I gather that 2400 transactions fit into a 1 MB block. That's 436 bytes per transaction record. But what's in a transaction record? Is there a good Powerpoint presentation that describes how Bitcoin ...
6
votes
2answers
4k views

How will the Bitcoin network look after BFL ASIC hardware shipments?

There have been over 7000 pre-orders of BFL SC series mining machines, with the cheapest one supposedly running at 3.5 GH/s and the most expensive being 1000GH/s thats a lot of hashes about to be ...
8
votes
3answers
1k views

Has anyone ported the Bitcoin software to plain C or Objective C?

I'm not a big proponent of either C++ or Boost. Has there been any attempt to rewrite Bitcoin in plain ANSI C, or maybe Objective C? Thanks.
12
votes
4answers
2k views

MintChip and Bitcoin - how do they compare?

The Royal Canadian Mint announced some time ago a new solution called MintChip, which appears to share some similarities to Bitcoin. How do those two projects differ, and how are they similar?
3
votes
1answer
1k views

Javascript widget that shows the balance of a particular address

Is there an embeddable javascript widget (perhaps using blockchain.info API) that can show information about a specific Bitcoin address? Like current balance, total incoming, outgoing, and latest ...
7
votes
1answer
1k views

What laws apply to selling / buying bitcoins for USD in California?

Please help me identify any laws that would be potential blockers to selling and buying bitcoins in person.
3
votes
1answer
1k views

Where can I store a Bitcoin Wallet Safely?

I am a newbie and I would like to know where can I create/store my Bitcoin Wallet safely. I have downloaded the Bitcoin software but storing it in my local computer seem like a high risk, but also is ...
2
votes
0answers
663 views

How to use downloaded blockchain on ubuntu?

I am using a fresh install of Bitcoin and have no wallet with coins at this time, and want to use the Bitcoind service in short time (loading blockchain using bitcoind will take days because of slow ...
5
votes
1answer
925 views

Can a Bitcoin server have a .onion ToR address?

Is it possible for a Bitcoin server to have a .onion ToR address? If so, are there any in existence today? (Note: this is an alternative to hiding addresses via the Azure Service Bus)
6
votes
2answers
974 views

Receiving bitcoins without open client?

If I am planning to accept bitcoins, does my client need to be running? Can I simply give out my public key and open the client later to receive? Does it depend on the client (I use MultiBit)? ...
10
votes
3answers
2k views

Testnet eWallet?

Is there any eWallet available that works on the TestNet? I want to test some payments and so forth and sometimes I want to have an access to an online wallet, so I don't need to hassle with ...
3
votes
2answers
522 views

Zero to Bitcoin in sixty seconds - how to set up a Bitcoin client in case you need it fast?

Lets say I have a bitcoind instance running on a server with proper wallet.dat backups created regularly. The server crashes, blockchain data becomes corrupted or what have you, and I need to set up a ...
1
vote
2answers
758 views

Balance still not available?

I just sent bitcoins from one wallet to another to make my life easier. This was the goal, anyway. My balance in my new wallet went up, but it's still not available after 3 hours. Why might this be? I'...
2
votes
1answer
670 views

What technology will supersede the BerkleyDB format? What are the current scalability limitations?

How scalable is the BerkleyDB format (the technology used within a wallet), and what are its limitations? What technology would replace or supplement BerkleyDB to address those scalability challenges?...
5
votes
1answer
358 views

How does Blockviewer work? (tool to discover identities of “anonymous” bitcoin transactions)

I'm trying to follow the logical sequence of how Blockviewer works and only see this one blog entry for the process, but no "part 2". Can someone describe the techniques to link a wallet address to ...
4
votes
4answers
5k views

Who to rent virtual private server from accepts bitcoin? [closed]

Have preferences for service. Desirable that machine hosted in nation disagreeable with United States. Standard linux images available. Will create webpage which lists links to youtube videos, expect ...
12
votes
4answers
9k views

Need authoritative source for historic Bitcoin conversion prices from all exchanges

What are the authoritative sources for historic Bitcoin prices? Ideally this will be an API for all major exchanges.
13
votes
4answers
9k views

What happens once the mining reward gets cut in half?

Sometime around the end of 2012 the mining reward is expected to be cut in half from 50BTC/block to 25BTC/block. What effect will this have? Doesn't this mean that it will be less economic to run a ...
2
votes
2answers
2k views

Does blockchain.info show all transactions?

My client is still syncing, so I've been checking my transactions on blockchain.info. It only shows two transactions although I know I should have more than that when I search my address. I'm new to ...
3
votes
2answers
130 views

Could many large forks cause a DoS attack on the miner?

Suppose it was possible to influence a miner to create many forks. My understanding is that a miner won't retransmit the fork, but will track it internally. Where is this information saved in a ...
2
votes
1answer
3k views

(litecoin) High hashrate but low amount of submitted shares in solo

I'm playing around with litecoin mining and have been mining at a pool but decided to mine solo using cgminer. When I mine at pools the amount of shares submitted to the pool sinks dramatically when ...
1
vote
2answers
277 views

how http://blockchain.info/, http://blockexplorer.com/q or http://www.bitcoinmonitor.com/ works [duplicate]

Possible Duplicate: How can I read information from the blockchain? Can anyone tell me from where exactly sites like http://www.bitcoinmonitor.com/ http://blockchain.info/ can't post more ...
5
votes
1answer
1k views

What are the internal details of GetWork() .. the foundation of Bitcoin mining?

According to this answer GetWork() sends "a chunk of data containing the block data, including the randomized bits, and the nonce (the bit which the miner changes)." Can anyone provide details on ...
5
votes
3answers
2k views

Cooling for an XPS 15 (L502x) laptop during Bitcoin Mining

I would like to know exactly where I should put my extra cooling fans around my laptop so that I can more efficiently cool while I mine bitcoins. I realize this is not optimal at the moment, but ...
-1
votes
1answer
857 views

What computations does Btcoin perform during mining? [duplicate]

Possible Duplicate: What exactly is Mining? What are the exact computations dies Bitcoin is performing during the mining? I understood that it has to do something with hashes and proof-of-work. ...
5
votes
2answers
569 views

What is the legal money range for a bitcoin transaction?

What is the legal money range for a bitcoin transaction message ? I am guessing that the lower limit is one satoshi but what about an upper limit aside from the maximum block size constraint ?
7
votes
1answer
544 views

Generating addresses starting with certain characters such as “JoeAnonymousUserB7pMqyVa8JRcpZdCQLQ”

Similar to how the SHA256 hash competition exists to validate a transaction, I wonder if this concept can be ported to addresses, so that the first few characters is significant to a human reader. Is ...
4
votes
3answers
1k views

What other purposes can I use my [obsolete] hashing hardware for?

It's pretty easy to reuse CPUs or Video cards that were previously used for Bitcoin hashing, but what can I do with FPGA hardware when the difficulty becomes too high for it to be worthwhile to mine? ...
5
votes
3answers
907 views

Must mining be profitable for Bitcoin to succeed? If no, what are the mitigations?

It is clear that mining is responsible for securing the network, and it is incentivised by block payouts and transaction fees. I've also seen discussions regarding different incentives for miners ...
6
votes
1answer
258 views

Vouching for (or against) the reputation of a bitcoin user

Since it's possible to link non obfuscated transactions to a "user" does is make sense, or it is possible for anonymized users with an established transaction history to "vouch" for another? I'm ...
5
votes
2answers
12k views

Transfering Money From My Bank Account To Bitcoin? [duplicate]

Im quite confused about this bitcoin software/system. I have successfully sync'd to the network (took hours) and have recieved my address. Now, if someone is selling something for 5Bitcoins. What is ...
4
votes
1answer
474 views

“State of the Coin 2012” and the mention of Satoshi Dice

Jeff Garzik in his presentation "State of the Coin 2012" put the following slide: Bitcoin development Like trying to fix and upgrade a car, While the car is going 100 m.p.h., With users ...
5
votes
1answer
585 views

How can one use multi signature transactions/addresses to improve the security of their services?

Multi signature transactions and addresses are heralded to be a good way to improve security of various Bitcoin services. However, how should one go about using them in order to achieve that goal? For ...
2
votes
1answer
359 views

How do I validate the correctness of a bitcoin multisig address?

Normally when validating a bitcoin address I Base58 decode the string, validate the checksum, throw away the checksum, and end up with 21 bytes. Then I verify that the address is fr the correct ...
3
votes
1answer
418 views

Is there a way to buy or sell Bitcoins for Iceland Kronas?

Say I was living in Iceland and wanted to convert my local currency to Bitcoin and back. What are my options?
4
votes
2answers
577 views

What GUI clients support multisig transactions?

Are there any major current UI wallets (desktop/mobile/web) that support creating / spending multisig transactions?
5
votes
2answers
3k views

How can I use multisig / split keys using My Wallet?

I was sure that My Wallet supported multisig, but I can't seem to find it now. How can three users of My Wallet create an address that is only spendable if at least two of them cooperate? Or is this ...
1
vote
1answer
154 views

What are the specific interactions between a Wallet client/node and a Miner?

I'm researching the interactions between a Wallet and a Miner. Although I'm also interested in the high level sequence of operations, I'm also interested in discovering the protocol and verbs used in ...
4
votes
1answer
2k views

What is the key difference between the Proof of Activity proposal and Proof of Stake?

coblee (Litecoin creator) suggested a new Proof of Activity method, to complement Proof of Work, instead of using Proof of Stake (oh my!) Can someone provide a tl;dr of what is the key problem in PoS ...
2
votes
1answer
318 views

How was the overflow bug of 2010 detected? Should UINT64_MAX value transactions be considered suspicious?

The overflow bug of 2010 was a result of a client that summed two values together and reaching INT64_MAX instead of UINT64_MAX. Should transactions of INT64_MAX (or any similar constant) be treated ...
6
votes
1answer
1k views

Where and how is secp256k1 used within Bitcoin?

Bitcoin is unique that is uses secp256k1 to secure it's transactions; and any cryptographic attack against this algorithm is probably going to be percieved as an attack against the bitcoin network. ...
3
votes
2answers
333 views

If the computer calculation rate becomes 100x faster, would the value of bitcoin drop to 1% of the previous value?

This is my main concern, but are there any other design flaws with Bitcoin?
3
votes
1answer
4k views

What is a transaction's step-by-step life cycle?

I'm trying to understand a transaction's lifetime and haven't yet found a technical, linear "timeline" of events that occur when a P2P transaction occurs. This is my understanding so far; please ...
3
votes
1answer
1k views

How do I convert Bitcoin to cash at my bank via Mt. Gox?

If I use Mt.Gox to do this, what are the specific steps I need to take?
1
vote
2answers
207 views

Without being continuously connected to the network, how can I protect from Double Spend attacks?

I'm a vendor who is interested in protecting myself from double spend attacks. What software, configuration, connectivity, or timeout is required to mitigate this risk? Namely, how would I protect ...
2
votes
1answer
296 views

What ways does a miner differ from a wallet?

I'm trying to understand how transactions are broadcast, the time is synchronized, and the chain extended. I have a wallet on OSX that required me to fully synchronize with the network. Contrasting ...

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