0
votes
1answer
9 views

Preventing the exposure of public addresses on a website

My Clients are demanding more anonymity and security in their web apps, those that use btc and ltc, etc. They are not comfortable with Exchanges and central points of possible failure. Let's ...
0
votes
0answers
7 views

Unconfirmed transaction - Non(e) standard input

A few hours ago, I created an offline transaction using the offline transaction tool available at: https://www.strongcoin.com/downloads/offlineTransaction.zip I coped and pasted the resulting ...
0
votes
0answers
7 views

Connect to LakeBTC API via Python

I'm having trouble following LakeBTC's API instructions for connecting to their API via Python. API Documentation: https://www.lakebtc.com/s/api I have my key (email address) and secret. I'm using ...
0
votes
1answer
10 views

Who generates the coinbase transaction?

As the wiki article says, Given just those fields, people would frequently generate the exact same sequence of hashes as each other and the fastest CPU would almost always win. However, it is ...
0
votes
0answers
18 views

API Call when a transaction is unconfirmed

Is there a way to get blockchain.info API call to know when the network sees an unconfirmed transaction? I'm also interested in any other method to get this result. The API works fine on the first ...
1
vote
0answers
20 views

Bitcoin payment verification

I am having a tough time in understanding how Bitcoin payment verification works: How is Merkle tree related to Bitcoin blocks? Had Merkle tree not been there, what would have been the problem?
2
votes
2answers
39 views

Who specified the Bitcoin protocol?

I went through the original paper by Satoshi, which outlines the Bitcoin protocol. However, the paper is a high level overview of Bitcoin, and does not specify important parts of the protocol. Who ...
-1
votes
0answers
31 views

How do I use Bitcoin?

I created a bitcoin address some time ago. I used a site that sends Bitcoin to my Bitcoin address. When I made my first withdrawal request, the amount went to blockchain.info/address/<my bitcoin ...
0
votes
2answers
14 views

How can i set up CPU mining on bfgminer?

I just downloaded Bitcoin Core and BFGminer on linux and I would like to start CPU mining just to see how it works, maybe later I'll buy ASIC. So, how can I configure CPU mining on BFGminer?
1
vote
2answers
38 views

Reusability of ASIC miners

I'm looking into the re-use of ASIC miners to perform other mathematical tasks; for example, the sum of a prime and a random number producing a massive (arbitrarily long) integral value i.e. ...
0
votes
0answers
10 views

Do you think Bitcoin will be more stable in the future? [on hold]

I am wondering if how much longer Bitcoin will last since it is said to be a digital currency. Do you have any idea about it?
-2
votes
0answers
17 views

What do you think about this Bitcoin Forex, bitcointrader.biz? Is it really a scam or the hacker? [on hold]

Investors on Bitcoin Trader were left asking for explanations, but owner John Carley was nowhere to be found. Instead, a statement from Carley was released, explaining the real score behind the issues ...
0
votes
0answers
16 views

How could bitcoin be used to get around currency controls?

Whenever I hear about a country with severe currency controls (e.g. Tunisia), I wonder if bitcoin could somehow be used to get around them. So far, the only way I can think of is if exporters in that ...
1
vote
1answer
28 views

How do deterministic wallets know how many keys to generate?

Say I backup the "seed/key" for a deterministic wallet. I then create 10,000 transactions, resulting in 10,000 new addresses being generated. Say I then lose the wallet file and I restore from the ...
0
votes
0answers
14 views

Error Compiling Bitcoin Core on OS X

I am running OS X Yosemite. I cloned the bitcoin repo and checkout-ed the v0.9.3 tag to get the most recent stable version. Then I followed the steps described here to compile the code. It compiled ...
0
votes
1answer
16 views

If I want to run the Bitcoin client from another OS, can I direct Bitcoin to an already downloaded Blockchain on another OS' partition?

I have fast internet, and it wouldn't be too much of a struggle just torrenting the bootstrap.dat, but it would make sense to make use of an already existing blockchain and save space and time. I've ...
0
votes
0answers
10 views

BlockChain.info testnet wallet and API

Does blockchain.info provide wallets and API service for testnet? This information is quite hard to find from their site.
1
vote
1answer
24 views

Difference between bitcoin-tx, bitcoin-cli, and bitcoind?

I just pulled from the bitcoin github and compiled, and noticed that there were three executable generated: bitcoin-cli bitcoin-tx bitcoind I have not heard of bitcoin-tx before, what is it? ...
2
votes
1answer
18 views

Does OP_HASH160 consume the top stack element?

In a standard P2PKH configuration, the scripts look like: Pubkey script: OP_DUP OP_HASH160 <PubKeyHash> OP_EQUALVERIFY OP_CHECKSIG Signature script: <sig> <pubkey> When ...
1
vote
0answers
24 views

Bitcoin Core and Armory working together?

I am confused, totally new to Bitcoin and not really a digital expert, so forgive me if the following is stupid. I downloaded Armory two weeks ago and it asked me to also install Bitcoin QT which I ...
0
votes
0answers
30 views

How to determine a break even point and how many coins one can mine?

If I had a Block Erupter 49 Port USB Hub and started filling it with AntMiner U2 USB miners, how do I figure out how many coins I can mine versus the expense of the hardware? (lets forget about ...
0
votes
1answer
29 views

Is it possible for corporate interests to incentivize securing alternate Blockchains instead of Bitcoin's Blockchain?

Is it possible for corporate interests to incentivize securing POW of alternate blockchains instead of Bitcoin's blockchain? Given the large amount of funding and/or "partnerships" announced the last ...
1
vote
1answer
16 views

How to denote <serialized> script in P2SH transaction?

From the bitcoin developer page, the format of the scripts used in P2SH transactions are as follows: Pubkey script: OP_HASH160 <Hash160(redeemScript)> OP_EQUAL Redeem script: <OP_2> ...
2
votes
1answer
33 views

Is anyone using the blockchain (or other core Bitcome technology) for device registration?

I've been reading about several alternate uses for the underlying technology behind Bitcoin: Proof of Existence (digital notary) Namecoin (for DNS as well as identity and messaging) I was ...
-7
votes
0answers
24 views

please help me I am DEVELOPER [on hold]

hey can you please take a look at my code i am the newest developer for dime coin and i am having problems with my jsonrpc.php it keeps having a error can you run the code https://t.co/CGuFTFJVNH ...
0
votes
2answers
33 views

How do I list the addesses in my keypool?

I want to list all of the addresses in my wallet, even the ones that aren't being used right now. I know that I can change the number of addresses with -keypool, but I want to list all of the ...
2
votes
0answers
22 views

Is it possible to specify a default change address?

Is it possible to enable default change address on my bitcoin-qt (aka bitcoin-core) client? I'm using a webservice that monitors my balance (based on public keys) and whenever I send a transaction my ...
0
votes
0answers
4 views

How do I change the default blockchain Database download location for NXT?

I'm testing out the nxt client and was wondering how do i change the default database download location? Its currently downloading to the current folder (nxt_db).
0
votes
1answer
36 views

Could a modified miner send a transaction and broadcast it immediately upon discovery of a block to claim a new block and the 25 BTC block reward? [on hold]

Could a person hack their miner to simply submit small transaction as soon as a block is found and to submit that as a new block with the 1 transaction to reap the 25 BTC block reward? Say, sending ...
1
vote
1answer
35 views

Which part of code (function) handles received transactions?

I was trying to understand the flow of control between functions (operations performed and their order) when a transaction is received.
0
votes
2answers
55 views

Who give initial value to Bitcoin? [on hold]

I know how the process of changing BTC price ​​occur, but I curious as to what gave the initial value to BTC and whether the price of another cryptocurrency refers to the BTC? How would I replicate ...
0
votes
1answer
32 views

Bitcoin recovery? Need help

Im looking for some advice on trying to recover bitcoins. So, the story is, i transferred some bitcoin to my multibit wallet, it came through but still didnt confirm after 20 hours. So i tried ...
1
vote
2answers
27 views

How does a Trezor passphrase prevent restoration of a wallet if an attacker knows the seed?

Trezor User Manual says if you forget the passphrase there will be no way to recover your bitcoins. Not even the Recovery seed. How is it that you (or an attacker who knows the seed) can't just ...
1
vote
2answers
39 views

What is the current status of Multi-Sign function in bitcoin network?

Are they convenient enough for some real world transactions? Like an easy escrow that the two party can assign to a third party to finish a transaction?
0
votes
1answer
48 views

Do Bitcoins mined in a pool automatically transfer to your wallet?

I've installed the GUIMiner app and the Multibit app. I am in a mining pool, and I have about 17 shares thus far. Do the Bitcoins transfer to my MultBit wallet automatically or do I need to do it ...
0
votes
0answers
19 views

okcoin - separate USD/CNY exchanges? [on hold]

So I'm trading USD on okcoin.com. I was looking at https://bitcoinwisdom.com/ There I see the 7 day volume for BTC/CNY is 2,106,799 The 7 day volume for BTC/USD is 438,759 There's five times more ...
0
votes
0answers
14 views

How The Ideal Reserve “branch reconciliation” “in less than 400 ms”?

Here says After having launched bootstrap Clearinghouses on all major continents, they are fully reconciling transfers in less than 400 ms with competition and 200 ms without. "Reconciliation" ...
0
votes
1answer
20 views

Deterministic keys with one-way operation

BIP 0032 "Security Implications" states One weakness that may not be immediately obvious, is that knowledge of a parent extended public key plus any non-hardened private key descending from it ...
2
votes
2answers
35 views

Can a Trezor seed be used in any other HD wallet?

Trezor FAQ says If you do not use a passphrase, your recovery seed is all that is needed to access your bitcoins. If you do not use a passphrase, can the Trezor seed be used to recreate a ...
0
votes
1answer
31 views

Insert data to transaction with OP_RETURN

This might be a possible duplicate with this. I want to know a proper way to insert additional string with OP_RETURN and retrieve the transaction from block chain and decode it accordingly. Thank ...
0
votes
0answers
13 views

Two out of Four transaction with excluding some key pairs

Is is in theory possible to set up a 2 out of 4 multi-sig transaction but only to allow only a subset of all possible combinations? More concrete: I want to have the keys A,B,C,D Valid combinations ...
2
votes
2answers
77 views

What is it about a Trezor that means it can't be infected by malware?

The Trezor testimonials include that TREZOR ... cannot be infected by malware What is it about a Trezor that means it cannot be infected?
2
votes
1answer
67 views

Where is the bitcoin wedding transaction?

There has been some buzz in the news about a wedding that put a statement in the blockchain declaring their message. Here is one source that reported on the news. Can anyone provide a link to the ...
1
vote
1answer
24 views

How does serializing in coins.h work?

I'm talking specifically about this: /** pruned version of CTransaction: only retains metadata and unspent transaction outputs * * Serialized format: * - VARINT(nVersion) * - VARINT(nCode) * - ...
1
vote
0answers
27 views

How do satoshidice's draws work? (HMAC hashes)

I am trying to understand how does a satoshidice draw work. As far as i have understood satoshidice generates daily two public hashes: HMAC hash (H from here on) Position hash (P grom here on) ...
4
votes
2answers
101 views

What is the average size of a bitcoin transaction?

I'm curious, since the inception of bitcoin, what is the average size (in bytes) of a bitcoin transaction? To be clear, the easiest way to find this is not to take the size of the block-chain and ...
2
votes
1answer
84 views

How to add additional information to transaction?

I want to add some additional information to my specific transaction, so that I can send the additional information to blockchain.
0
votes
1answer
39 views

How to get started with a Bitcoin wallet [closed]

Where should I go to start a wallet? I have downloaded the TOR browser and got online at WEUSECOINS.COM. Is there another site, perhaps one with more information for beginners, that I should be ...
0
votes
2answers
65 views

Does the value of my Bitcoin fluctuate automatically?

If you own a small amount of Bitcoin (say,$10) does one have to "invest" it somewhere for it's value to change or will the $10 fluctuate by just sitting in one's wallet and one can see the value ...
1
vote
2answers
83 views

What / Who is the Bitcoin mining-power useful to?

I searched the internet to find out who (or what) was taking advantage of the result of mining but i couldn't find a clear and complete answer (and sources). I know Bitcoin miners decrypt hashes, ...

15 30 50 per page