0
votes
1answer
53 views

How do I set up GUIMiner to use my cpu?

I'm using GUIMiner. It's not using my CPU. My CPU is at a very low utilization (~10%). What I can do to use my CPU? Why isn't CPU mining turned on by default?
1
vote
2answers
78 views

Why don't any of the SHA-256 vulnerabilities matter for mining?

Wikipedia lists several vulnerabilities in SHA-256. Presumably, none of them can be used to mine faster, or it would be done already. Why don't these vulnerabilities lead to a problem for mining?
0
votes
3answers
42 views

Why I don't need to specify public key to import paper wallet

I created a paper wallet on coinbase and wanted to import it to coinbase.com. It allowed me to import it by specifying private key only. I was surprised that I didn't have to specify public key as ...
1
vote
0answers
20 views

Multi GPU mining broken since upgrade to Ubuntu 14.04

This is related to scrypt mining. I upgraded to Ubuntu 14.04 and after a bit of a hassle I have got almost everything working, except my mining. The issue seems to be a mismatch between OpenCL and ...
1
vote
1answer
57 views

What's the minimum setup to mine a block alone?

What's the minimum setup that you guys know, that can, today, mine at least 1 block alone, without the use of mining pools? I know I wouldn't be able to afford it, but just by curiosity...
2
votes
1answer
45 views

Why do the Bitcoin RPC Calls use decimals for coin amounts?

The Bitcoin RPC calls all use 8 digit decimals ('reals') to encode amounts of satoshis. For example, if I get a transaction output, it might look like this: { "value" : 0.00050000, "n" : 1, ...
0
votes
0answers
40 views

How can I install a bitcoin wallet on Kali Linux?

I got Kali Linux installed on my laptop and I want to install a good bitcoin wallet to store my bitcoins offline.As I know,top 5 best bitcoin wallets would be Bitcoin Core (the first offline ...
0
votes
1answer
25 views

Accepted shares won't go above 200

I'm new to Bitcoin mining, but I'd like to think I got things set up. I'm using guiminer, on slush's pool. For some reason, my accepted shares won't go above 200. I have no stale shares but my ...
3
votes
2answers
81 views

Why wait for several confirmations before shipping?

Suppose customers pay me bitcoins for their purchases. As far as I understand, I could check block chain that the proper payment amount has been made to the address I generate for each customer, and ...
1
vote
1answer
327 views

Is mining an instant process or it generates fraction of coins constantly?

There are hashing calculators in the internet that tells the average amount of bitcoin you'll make in a period of time. I know that when you generate a block you gain 25 BTC (I guess it is still the ...
1
vote
2answers
39 views

Profit possibility for colluding with 51% attacker

The Bitcoin Wiki states "A profit-seeking person will always gain more by just following the rules, and even someone trying to destroy the system will probably find other attacks more attractive." ...
-2
votes
0answers
34 views

how to fork a SHA256 altcoin

I would like to make changes to an altcoin (SHA256). They are simple enough, but I will need to fork it .. Honestly, I have looked around for an answer and just get things that are not useful or ...
0
votes
2answers
76 views

Can I mine cryptocurrency using Javascript?

Is it a good idea to mine a Scrypt-based cryptocurrency, like Dogecoin or Digitalcoin, using Javascript instead of having paid ads. The script would mine using all computers visiting my website.
2
votes
2answers
44 views

I don't have my 12 word question but I do have my PIN and my computers MAC address

I have been using my Hivewallet on my laptop for over 3 months and not once has it asked me for my 12 security words. In the past I figured it had picked up my MAC address because all it ever asked ...
0
votes
0answers
29 views

Bitfinex API - clarification of “timestamp” in orderbook API request

Does anybody know what value "timestamp" in orderbook POST actually means? The response is structured as follows: bids (array) price (price) amount (decimal) timestamp (time) asks (array) price ...
1
vote
1answer
43 views

A life-cycle of a transaction - correct?

Newbie alert ! Please let me know if this is not the right forum. So I have spent time reading up on Bitcoin. I think, I understand now; but, would love to have it confirmed. To start with, we have ...
1
vote
3answers
90 views

If using Bitcoin core client am I constantly going to be downloading data from the blockchain?

I understand you have to download the entire blockchain and sync in the beginning but don't you also have to constantly keep the software on if you want to buy/sell stuff, which means more data being ...
2
votes
1answer
77 views

Could somebody be traced in a situation like this?

I'm fairly new to bitcoins and wanted to know if somebody could be traced easily in a situation like this: Somebody buys btc with his/her own name Btc are sent to an address, an offline wallet, ...
1
vote
1answer
28 views

BitFinex API call returns 400 bad request - “Could not find a key matching the given X-BFX-APIKEY”

I dont know what I'm doing wrong, but everytime I try send post request "https://api.bitfinex.com/v1/balances" or some else I got this answer "Could not find a key matching the given X-BFX-APIKEY". I ...
0
votes
2answers
56 views

Dont understand how to buy Bitcoin. Looked at sites but makes no sense to me

I can see prices and do not understand how you buy Bitcoin. I was told you could buy as little as $1 worth. What would you get for $100? Nothing really helps me understand this.
1
vote
2answers
68 views

When miners are working on their block, do everybody's block have the same transactions in them?

In this webpage https://en.bitcoin.it/wiki/Blocks, it says this "Bitcoin transactions are broadcast to the network by the sender, and all peers trying to solve blocks collect the transaction records ...
1
vote
1answer
32 views

Why would sending a raw transaction from a different node fail?

When I make a transaction spending an output on one machine (sending it to another locally owned address), and then broadcast it on the same machine, it all works fine, as below. (NODE A) $ ...
1
vote
1answer
32 views

Multi coin won't sync error mac osx

When i open Multibit it tries to sync then says error, unable to load block chain. I can't figure it out. Don't know what to do about it.
1
vote
0answers
36 views

Server cannot connect to Peers With Some Internet Connections

I use the internet at my work, at my house, and at various other places. The server can connect with other peers and get block data at all of these locations except for my home. What could be the ...
1
vote
1answer
53 views

Mining on Pegged Side Chains

How would mining, theoretically, work in Pegged Side chains? If mining can be done on these side chains, then it seems like too many coins could be created. And once they were used in transactions, ...
0
votes
1answer
40 views

If I am spending multiple inputs from the same address, must I provide a signature for each input?

Suppose I have two inputs belonging to the same address. Do I need to provide a signature script for each input that proves that I own it? Wouldn't that waste space? Also, in the standard client, ...
1
vote
1answer
45 views

External GPU for mining

Of course, there are lots of ASICs out there with exponentially more hashing power. But I'm not yet ready to invest and dedicate to one coin. Is there a mining solution in which one can set up an ...
4
votes
5answers
966 views

Is Cointellect a scam? [closed]

I downloaded coin Miner from Cointellect.com on my PC and I started mining. I have some questions: Is the software a scam? Has anyone gained real money from this software? When I read forums, ...
1
vote
2answers
38 views

How do I check the checksum of a Bitcoin address?

I'm working on a Bitcoin ATM. We want to detect addresses that are entered incorrectly. There's a checksum on Bitcoin addresses - but how can we check it?
2
votes
0answers
25 views

Utilizing Bitcoin for Bond Certificates

I have a product that is in development and I want to allow people to buy something like bonds to raise money for the project. I was thinking to develop my own protocol for defining these bond ...
0
votes
1answer
32 views

How can I remove the charity features in my Devcoin clone?

I'm trying to produce a SHA256 altcoin which is merge mined with Bitcoin. I'd like to use some recent code, rather than base in on a 0.8.* or earlier codebase. I've found this source: ...
1
vote
0answers
30 views

Getting a Zerocoin for d bitcoins

I've read the Zerocoin paper by Miers et al. and understood most of the concepts. How do I get a zerocoin for some denomination in bitcoin? e.g. If I spend (d bitcoins + txn fee) in a bitcoin txn ...
1
vote
3answers
56 views

What's the easiest way to someone to double-spend 0-confirmation transactions?

I heard there is a desktop app today that 'easily double spends 0-conf tx'. Which is it? Is anyone working on a mobile version of this app?
0
votes
1answer
82 views

To open “MultiBit” you need to install the legacy Java SE 6 runtime

I am unable to resolve this. I have updated Java but it appears to require a previous version. Thank you.
1
vote
3answers
131 views

two people with same PUBLIC address, how will people/network know how to deliver bitcoin

I understand that a bitcoin address is a combination or more than one kind of encryption and entropy, and I also understand how improbable it is that the same address will get generated at the same ...
0
votes
0answers
20 views

Infinitecoin (IFC) transaction delay

A few weeks ago, I made a transaction from an online wallet (coins-e) to my personal (infinitecoin-qt) wallet. Initially I looked for the transaction ID using exploretheblocks for Infinitecoin's ...
1
vote
2answers
60 views

An “Almost” decentralised currency

I've been interested in Bitcoin for a while. I've been thinking I'd like to give it a go and see if I can make my own cryptocurrency, just to see if I can. I run my own small web hosting company, the ...
1
vote
1answer
48 views

Can I use my Bitcoins to buy household commodities just like ordinary money?

Can I use my Bitcoins to buy household commodities just like ordinary money? You see, I'm a newbie and have yet to learn the basics including all the facts about Bitcoins. However, I want to be ...
0
votes
1answer
27 views

How do addresses that refer to a web site work? [duplicate]

Some bitcoin addresses on blockchain.info refer to an external website, see e.g. here: https://blockchain.info/tx/40c09e1fb345d258b8123c5e6ceda3d53575def3053c87bf7d5571c74fc2227d One of the ...
0
votes
0answers
14 views

Compile CudaMiner from source from the github page

I'm just being paranoid, but how do you compile cudaminer (https://github.com/cbuchner1/CudaMiner) from source? I'm on windows 7 64bit. Or where is a reliable site that I can download a precomipiled ...
0
votes
0answers
40 views

What is the latest and easiest to following guide to multipool mining with a Nvidia Geforce GT 730M?

I have a built in graphics card on my thinkpad Geforce GT 730M, I know its not all that great, but I'm usually on this thing at work for at least 8 hours a day. I want to be able to at least monetize ...
0
votes
1answer
26 views

real time number of transactions world wide

https://blockchain.info/unconfirmed-transactions?format=json I have been given an api key, I would like to call the above url every second to count the number of tx in real-time. I don't think that ...
1
vote
1answer
135 views

How do I use mSIGNA without the standard Bitcoin client?

Which IP do I have to fill in in mSIGNA to connect to the Bitcoin Network without using the BitcoinQt/bitcoind application? Is it possible to use mSIGNA and BitcoinQt even if the syncing process is ...
0
votes
3answers
35 views

Would it be a good idea to have several different *coin to protect oneself from fluctuations?

I'm interested in *coin, but I'm afraid of sinking money into something out of idle curiosity and then losing that money to value fluctuations. Would it be a good idea to have several different *coin ...
1
vote
1answer
140 views

Best way to mix bitcoins? mixer, coin join (shared send), dark wallet, stealth addresses?

When you want to anonymize a few hundred BTC, what would be the best (safest) way? I can think of these alternatives: Deposit to and withdraw from exchange (like Kraken, Bitstamp, etc)Pros: ...
0
votes
1answer
19 views

Block chain api support - Im unable to seperate the credit and debit transactions using blockchain api

I'm using blockchain api to display transactions of credits and debits seperately, I'm using the below procedure for displaying credit and debit transactions. But credit transactions are showing in ...
2
votes
2answers
73 views

How does the ECDSA verification algorithm work during transaction

I understand the basic concept ECDSA where if Bob wants to sign a message it generates a random number n, multiply it with the secp256k1, r = the x value , s = (H(x)dr)*n^-1 mod q. Also the ...
2
votes
2answers
87 views

How can I create a list of X richest bitcoin addresses?

I have looked around, but I can't find the code related directly to my question. I want to create a list in any format that contains the all accounts with balance over 0 for example. Thanks ahead for ...
0
votes
1answer
40 views

What RPC can I use to query the balance of an arbitrary address [duplicate]

How do I get the balance of an arbitrary address using Bitcoin RPC calls? From the RPC calls I can see you are required to have the private key or an account to use the RPC. For illustrations sake, ...
0
votes
1answer
37 views

How does OpenBazaar differ from NXT decentralized marketplace?

I'm contemplating if I should use openbazaar or the nxt marketplace. both a decentralized, but I have a few questions regarding openbazaar: What incentive does hosting a openbazaar node give? I ...

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