0
votes
0answers
14 views

How Satoshi managed to mine so much bitcoins beign the first user of the system? [duplicate]

I'm just learning Bitcoin and if I understand it's conception properly, mining of bitcoins means validation of transactions by computing hash which should satisfy some preset condition. In other ...
1
vote
1answer
95 views

Is multi-PPS the correct solution to the mining centralization problem?

See this post. Meni believes that this could be the correct solution to the mining pool centralization problem, and that are no known drawbacks. There is some work that needs to be done to write, test ...
0
votes
1answer
38 views

Create OP_RETURN tx with Bitcoinjs-lib

I know how to create a basic TX: var bitcoin = require('bitcoinjs-lib') var tx = new bitcoin.Transaction() // Add the input (who is paying) of the form [previous transaction hash, index of the ...
0
votes
1answer
23 views

using blockchain.info api_code

I make a JSON call to https://blockchain.info/tobtc?currency=USD&value=1 This is a free api with a request limit. I have just received my api_code via email. This is blockchain.info's example ...
0
votes
1answer
19 views

Blockchain.info keeps sending wallet backups

Blockchain.info is sending my wallet backups over and over again; is this someone trying to hack my wallet or something else? I haven't done anything on my account, no settings changed et cetera.
0
votes
2answers
74 views

Difference between a bitcoin wallet and the blockchain

As the title said, what is the difference between the bitcoin wallet and the bitcoin core, do i have to install both of them to work? Can I just have a bitcoin wallet?
0
votes
1answer
28 views

chain.com Bitcoin API: Does not provide “making wallet” feature?

chain.com's Bitcoin API is super easy to implement Bitcoin function into my iOS App. Checking the balance of a specific bitcoin address and retrieving transactions are very convenient. However, unlike ...
5
votes
1answer
114 views

What is a soft fork?

When people talk about possible changes to how Bitcoin works they sometimes say a particular change can be implemented as a soft fork. What does that mean? How does this compare to a hard fork?
1
vote
1answer
67 views

what would it take for the Bitcoin price to drop less than a dollar?

I don't understand why the prices have actually dropped these days so much. Some forums say that people are selling, so what? People are selling, and people are buying, the bitcoins don't disappear ...
3
votes
4answers
138 views

HD wallets and address reuse

HD wallets create a series of addresses, and then when one address has received an input it will give you a new address that hasn't received inputs yet So in the idea of you sending yourself bitcoin ...
1
vote
1answer
22 views

RPC addmultisigaddress call

I tried the following RPC call via the debug window: addmultisigaddress 2 '["0304a7aadeb1ae96482a10fa634825d86d80dbad8d43cd9177664eaf6f0ff7d890", ...
0
votes
1answer
16 views

How to export bitcoinj wallet

I am working on an app which uses bitcoinj. I want to implement export/import functionality to a standard format which can be shared with as many as possible wallet apps. Is there a standard format ...
4
votes
0answers
51 views

How can one realistically model the distribution of the network's unspent transaction outputs?

I am working on a simulation to explore the usefulness of a patch for the CoinSelection behaviour of BitcoinCore. To that end, I am looking for statistics on the distribution of unspent outputs ...
-1
votes
1answer
57 views

Is it possible to mine with core duo cpu 2.4 ghz? [closed]

My PC details: Processor: Intel(R) Core(TM)2 Duo CPU T8300 @ 2.4GHz 2.4GHz Installed Memory(RAM): 4GB DRAM Video Card GPU: Mobile Intel(R) 965 Express Chipset Family Could you please ...
1
vote
1answer
34 views

Understanding Bitcoin protocol (through practice)

OK, firstly, Ken Sheriff (the guy who mined Bitcoin using pencil and paper) has posted some fantastic Bitcoin articles on his blog. In "Using Bitcoins the Hard Way" he writes (emphasis added): It ...
1
vote
0answers
143 views

Why are double-spends bad? [duplicate]

In the answer to this question it is stated the bitcoind filters doublespends. What is the reasoning behind this?
0
votes
1answer
26 views

How to tell which account an unspent vout is in?

When I go to send coins, I want the transaction to ignore the unspent coins in a certain account. I think I can do this in wallet.cpp, but I'm not sure how. Maybe in the AvailableCoins() function? ...
0
votes
3answers
57 views

How can an online wallet be more secure than paper wallets or cold storages?

Recently, after I was reading that some bitcoin early adopter lost 750 BTC due to theft from his macbook, I was looking for the most secure storage solution for my coins. I already know about paper ...
0
votes
2answers
44 views

The Ideal Reserve is cryptocurrency? [on hold]

Is The Ideal Reserve a cryptocurrency? I need my currency to keep a stable price. Is it stable? I live in a country where cryptocurrencies in general are illegal. Is The Ideal Reserve ...
0
votes
3answers
64 views

Why block height is required in coinbase?

While reading bitcoin source I found this short comment: // Height first in coinbase required for block.version=2 (From https://github.com/bitcoin/bitcoin/blob/master/src/miner.cpp#L338). Why this ...
0
votes
2answers
46 views

Can decentralized blockchain technology like bitcoin be used to store medical information? [closed]

For example patients get private key, providers get public key?
1
vote
1answer
27 views

Blockchain transaction message length limit

When I perform a transaction on the blockchain, I can add a message to the transaction, which will then exist forever in the blockchain. Say for example I wanted to use the blockchain to store ...
3
votes
2answers
64 views

Accepting 0-confirmation transactions and detecting double-spends with open source solution

I would like to accept 0-confirmation bitcoin for very small amounts. I am happy to accept zero-confirmation spends and am aware of the risks. However, the tool needs the ability to "flag" the ...
0
votes
1answer
24 views

How can address' hash160 be used to determine information for malicious purposes? (Ie reusing of the same address)

I've been playing around with Richard Kiss's Pycoin app which is clarifying how P2PK works. I see that the hash160 of the value: (0x04) (x-coordinate) (y-coordinate) (for an uncompressed Testnet ...
1
vote
1answer
18 views

iPhone App for Bitcoin trading / transfering?

Is it any iPhone App that I can use to buy / sell / transfer easily Bitcoin? I want to be able to download from Apple's App Store.
2
votes
2answers
36 views

Is bitcoin vulnerable to a DOS/spam attack?

What happens if someone maliciously decides to make squillions of transactions on the Bitcoin network? I see there being two vulnerabilities. Firstly - computation resources used, though this ...
1
vote
1answer
37 views

Can someone explain the pitfalls of NXT Proof of Stake's potential issue of “nothing at stake”?

Many people talk about NXT Proof of Stake (PoS) being insecure due to the "nothing at stake" problem. I read up some posts about nothing at stake, but I still do not understand how it works. Can ...
2
votes
2answers
94 views

What are some of the proposed ideas to why the Bitcoin dropped to sub $400 in the end of summer 2014?

Having seen that BTC was around $600 early summer of 2014 (May-July). It is currently almost 50% of that value. I read many varying reports of the cause of such a big drop. Can someone give a list of ...
1
vote
0answers
37 views

Main Differences from Counterparty vs NXT Assets Exchange (SecureAE)

What are the main differences from counterparty and NXT asset exchange? I've been testing out the nxt asset exchange using http://www.secureae.com and using counterwallet. They both seem to be solid ...
0
votes
1answer
15 views

Check password for ethereum wallet

I have ethereum wallet and wish to check if some password was used to create it. How this could be done?
1
vote
1answer
30 views

How does Zerocoin work?

How does Zerocoin work? I got the idea that it is used to add anonymity in bitcoin. It converts bitcoin to Zerocoin and back to bitcoin. But how does this process work? I tried reading the research ...
0
votes
1answer
15 views

How do I run Armory Testnet on Win7 x64 using Bitcoin Core 0.9.3 using remote datadir?

Trying to use the testnet which I have no problems with using Bitcoin Core 0.9.3 with command: Bitcoin-qt.exe -testnet -datadir=f:\data\bitcoincore But running Armory using the Testnet icon attempts ...
0
votes
0answers
13 views

0 confirmations after several hours [duplicate]

I sent off a bitcoins from the bitcon-qt client to fund another bitcoin wallet and it has been seveal hours and there are still 0 confirmations what can I do about it? I have a mac and I am at a loss ...
1
vote
1answer
39 views

End-user security measures to protect your Bitcoins

I am trying to make a presentation on Bitcoin for my Security and Risk Analysis class. Currently, my research question is : What bitcoin security measures can enhance user-protection and reduce ...
1
vote
0answers
9 views

Banking partners with UK Faster Payments

What is the easiest way to have access to UK Faster Payments facilities as a Bitcoin business? The UK banks have been quite hostile. Can Bitcoin businesses have access to the Faster Payments network ...
-1
votes
1answer
41 views

Detailed guide on how to Create a Litecoin Fork, With Pre-mine instructions [closed]

I need a Detailed guide on how to Create a Litecoin Fork, With Pre-mine instructions, I would be very grateful if someone posted a comprehensive guide on how to Create a Litecoin software fork, with a ...
6
votes
4answers
336 views

How to find a specific bitcoin address from all the addresses?

Recently, I found a site that show all the addresses in a huge list, divided in 904625697166532776746648320380374280100293470930272690489102837043110636675 pages. The site's link is ...
-1
votes
1answer
82 views

After 21 million bitcoins [duplicate]

After 21 million bitcoins miners will be paid certain transaction fees but I need your guidance for clarifying following confusions:- Currently solving a block gives you 25 bitcoins but what is the ...
4
votes
1answer
34 views

Is there a class or sequence diagram for BitcoinCore?

I'm looking at the code located at https://github.com/bitcoin/bitcoin/tree/master/src Does anyone have a basic diagram of what calls what, just a sequence chart of how all the classes piece together ...
0
votes
0answers
7 views

What is a safe way to buy bitcoins from Japan? [duplicate]

I live in Osaka, far from Tokyo. I know there is bitcoin ATM in Tokyo, but how can I buy bitcoins from Osaka? Or is there any international company that will let me buy bitcoins via bank wire ...
0
votes
1answer
102 views

Why is the address 1MAdS7aPszWG4EYgBpbF9mnGUi5ChbMu8d sending me Bitcoins?

I'm receiving 1 satoshi today from an odd address. This account has been very consistent in creating spammy transactions that distribute 1 satoshi to a lot of account. Any one know what's going on ...
0
votes
0answers
11 views

GUIminer is mining but shares not showing up in my bitcoincz account

GUIMiner is collecting shares but on bitcoincz it is saying no shares or anything for my worker.
1
vote
1answer
38 views

Growth Dependent Block Size Limit

Could the 1MB block size limit be replaced with a growth-dependent limit? From what I have read (here, for example) the 1MB limit is to prevent spamming of the blockchain. And if/when Bitcoin becomes ...
0
votes
2answers
33 views

How much binary data (bytes) could I put in a transaction and how?

I know that some people had put text, pdf and images in the blockchain. I wonder which are the limits in order to have a minimum "bytes/btc" value in regarding the blockchain as a permanent database. ...
0
votes
1answer
62 views

Unconfirmed Transaction using Blockchain.info wallet [duplicate]

I sent 0.08 BTC yesterday using the blockchain.info wallet on the iPhone. It's been 24 hours and my money is still unsent; I really don't know what to do. It still says unconfirmed. Why is this? ...
0
votes
2answers
42 views

Hash property resistance

I'm experimenting with some self study cryptography and I was curious about the two following scenarios (simple answers and/or in relation to bitcoin) If SHA256 was found to lack pre-image ...
0
votes
2answers
61 views

Total number of Bitcoins generated by pool mining

Hi I'm doing some research regarding bitcoins and pool mining, however I couldn't find the following information online. Total number of Bitcoins generated so far by pool mining and how many miners ...
1
vote
1answer
136 views

Motivation to run full nodes

I'm sorry if I ask a stupid question. Bitcoin network was conceived by Satoshi Nakamoto as a decentralized network, but now we are seeing the full centralization of nodes in the United States. The ...
1
vote
2answers
55 views

Can you encrypt not just the private key, but also the public keys (ie bitcoin addresses) in an Armory wallet?

I would imagine that the paranoid darknety bitcoin user has an interest in keeping not only their private keys safe (so nobody can steal their bitcoins), but also has an interest in keeping their ...
0
votes
1answer
24 views

Migrate wallet from Bitcoin Core to Armory

I have installed Armory. I have created a wallet within the Armory. I however would like to use a wallet I have with bitcoin core. I am unsure how to do this. Thank you for the help. All I have ...

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