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18
votes
6answers
2k views

Has anyone attempted to make a working voting system using a bitcoin based system?

It occurred to me the other day that the difficult problem of electronic voting could possibly be solved quite nicely using a bitcoin system. I believe it's transparent enough to be trusted. I found a ...
10
votes
2answers
648 views

Can I hide my IP address by blocking incoming connections in the client?

I know that it is possible to find out the IP address of a transaction by connecting the client to every node in the network. Dan Kaminsky wrote: When you are connected to every node, the first ...
10
votes
2answers
320 views

What are acausal blocks?

In this forum post the poster (2112) writes: It is my understanding that at least Eligius pool isn't a "honest node" and intentionally produces acausal blocks (or at least as close to acausal as ...
20
votes
1answer
779 views

Gaming the “off-by-one” bug (difficulty re-target based on 2015 instead of 2016 block time span)?

In this forum post from Gavin Andresen he writes: Second: I've written 'discourage blocks' infrastructure: https://github.com/gavinandresen/bitcoin-git/tree/discourageblocks (code reviews ...
7
votes
2answers
1k views

Can an SMPPS (Shared Maximum Pay Per Share) pool be hopped?

I've looked at the way SMPPS (Shared Maximum Pay Per Share) payout schemes work, and as far as I can tell, there is no significant way to hop such a pool to advantage. Yet I've seen several people ...
42
votes
2answers
59k views

What is a share? Can I find it while mining solo, or only when pool mining?

In mining, what is "a share"? When mining solo, do I "find shares"?
19
votes
2answers
5k views

What happens if my transaction is not accepted because I did not pay fees?

I was reading this thread about a client fork that does not force transaction fees and I noticed the big red warning saying that some coins might get lost if I am not careful. What does this mean? ...
5
votes
2answers
5k views

What does “PROOF OF WORK RESULT: false (booooo)” mean when mining?

I'm mining (Litecoin miner, shouldn't matter) with minerd, and got this in the output: [2011-10-13 07:12:02] thread 1: 5524 hashes, 0.96 khash/sec [2011-10-13 07:12:02] thread 0: 5415 hashes, 0.95 ...
17
votes
4answers
6k views

Is there a way to automatically send bitcoins from one wallet to another?

Say I have 2 wallets, an older non-encrypted one and a fresh new encrypted wallet with all new addresses. If I have an address in the older wallet that may receive some bitcoins in the future is there ...
6
votes
1answer
709 views

`bitcoind` must be different from `bitcoin -server` because one gives an error message the other doesnt

Although the API reference implies that running bitcoin -server is the same as running bitcoind, I get no error message when running bitcoin -server with no bitcoin.conf file but I get teh following ...
17
votes
5answers
4k views

Is there a way to initiate a payment request in bitcoin?

I'm writing a recurring billing system and I want to be able to contact a customer and request a certain amount of money. Is this possible via bitcoin? If not, could a URL be provided the customer so ...
15
votes
2answers
2k views

What are Namecoins?

What are Namecoins exactly, how do they differ from Bitcoins, and how come one is able to merge mine them along with Bitcoins?
14
votes
1answer
4k views

What is NTime rolling/nonce range? And what miners support it?

From Slush's pool's homepage: Pool now supports Long polling and NTime rolling. Older miners have many problems with those new features, which can negatively affect your rewards. Please update your ...
25
votes
7answers
19k views

What Bitcoin Mixing/Laundry Services are availble today?

A Bitcoin Laundry or Mixing Service is a service that accepts BTC payments, and returns the same BTC amount, only from coins that are unassociated to the original BTC. It is a privacy service that ...
12
votes
3answers
2k views

Can someone with 51% computing power earn more than he deserves?

See also What can an attacker with 51% of hash power do? This may have been discussed elsewhere, but I'm not sure what the answer is - if someone owns 51% of the hash power, can't he just ignore the ...
7
votes
4answers
13k views

Is there a graph of Namecoin value over time?

Where can I find a chart (or even raw data) of Namecoin prices over time? NMC Watch doesn't seem to provide a link to historical data, just one day. In BTC? In USD?
13
votes
2answers
1k views

Is “bitcoin” a countable noun?

Should "bitcoin" be used as a countable noun admitting a singular and a plural (so that one says "600 bitcoins are in this wallet") or as a mass noun, (like "water" or "money") (so that one says "How ...
6
votes
2answers
756 views

Is there a uniform measure of “difficulty”, that when multiplied by price, will give “profitability of one hour of mining”?

I recently open Bitcoin Pie, a site that compares crypto-currencies. Given the exchange rate in BTC, I would like to add another column that tells "relative mining profitability", regardless of the ...
8
votes
3answers
14k views

Do I need a wallet to start mining?

Oh, sorry. The question is really simple: Do I need a wallet to start mining and "keep" this bitcoins? or Can I just stay with my bitcoins in my computer?
18
votes
5answers
19k views

When building bitcoind, I receive error “headers.h:36:20: fatal error: db_cxx.h: No such file or directory”

When building bitcoind on LinuxCoin (Debian based), I receive this error "headers.h:36:20: fatal error: db_cxx.h: No such file or directory" following the instructions at https://github.com/...
23
votes
5answers
15k views

Is there an open source Bitcoin exchange?

I just found this project, which is described a.t.m as a learning project. Is there a more serious, open source Bitcoin exchange? I'm aware exchanging BTC for fiat money can be quite complex, and ...
8
votes
3answers
731 views

Have there been reports of botnets mining Bitcoin / crypto-currencies?

Is the threat of Botnets using massive amounts of CPUs/GPUs to mine Bitcoin, or some CPU-friendly coin, purely theoretical at this point? Or have there been reports of this actually happening? I know ...
11
votes
1answer
751 views

Is there a limit to how much extra data can be put into blocks via scripts?

According to this answer, miners can include extra data in blocks. Is there an upper bound to how much a miner can add? How much?
35
votes
3answers
49k views

How can I start mining Bitcoin?

Ok. I don't care if I make only a small amount of bitcoins mining. I want to mine. How do I setup my machine (amd x64 4.6Ghz 6GB/RAM with GeForce Nvidia 7300, LinuxMint 10) to start mining? Is it ...
4
votes
1answer
521 views

When will the official client support partial blockchain downloads?

Are there concrete plans for the official client to be able to download just a portion of the blockchain? By concrete I mean what's the issue tracking this on github, is there a planned version for ...
9
votes
2answers
1k views

Does encoding Namecoin/messages into the blockchain bloat it?

I read today twice concerns about inflating the blockchain: NameCoin Bitcoin Message Service So, does using these services "over inflate" the blockchain? The way I see it, if another protocl rides ...
35
votes
9answers
12k views

Is there a Bitcoin bank, which gives interest on my deposit?

Is there any Bitcoin bank I can place my Bitcoins in that will give me a decent interest rate. It should be at least 1% for it to be worth it.
4
votes
1answer
420 views

How to get difficulty from Fairbrix/Tenebrix?

How can I get the difficulty of Fairbrix or Tenebrix directly from the client? Without using an external site. I use "getinfo" with Bitcoin but with Fairbrix/Tenebrix, "getinfo" doesn't return ...
3
votes
1answer
674 views

Where can I find a Windows binary of MultiCoin?

MultiCoin is AFAIK the only GUI client that supports NameCoin. Is there a trusted Windows binary to be found?
35
votes
6answers
130k views

What are stale shares and what can I do to avoid them?

When I mine at a pool, only a part of my shares are accepted. There is a small percentage which is marked as stale. As far as I know I only get paid for accepted shares, so what are these stale ...
9
votes
4answers
3k views

Are there any linux distros that have the bitcoin client pre-included?

Ideally would be able to make a bootable usb with a lightweight linux os which already included the bitcoin client.
3
votes
3answers
845 views

Bitcoin communication with non-standard ports

I'm writing a Bitcoin web app that is to be deployed on an external server over which I have no control. I probably won't have access to standard Bitcoin port (8333). Will this cause a problem when ...
5
votes
4answers
673 views

Can Bitcoin software be used to create a private currency (single issuer)

I understand Bitcoin software can be used for private currencies. Can it be used to create a private currency (the NewCurrency) where there is only one issuer of NewCurrency and any monies raised are ...
3
votes
2answers
137 views

Is the tenebrix client safe?

I'm fairly proficient in C++ and wondered if the tenebrix client was safe to use? Also if I wanted to review the code myself, are there any warning signs I should look for without studying the code ...
5
votes
3answers
2k views

What happens to cash used to buy bitcoins?

Are there any requirements to Bitcoin exchanges [USD/EUR/etc], as to for what the [USD/EUR/etc] may be used? Or is the [USD/EUR/etc] received property of issuer of bitcoins? Unfortunately, this is ...
5
votes
2answers
5k views

Port forwarding for pooled mining?

It does not seem to be necessary but does it help to use port forwarding for pooled mining? I mean forwarding the same port as the pool port on the incoming side of my router to the rig.
2
votes
1answer
234 views

Inflatory and deflatory economy comparison [closed]

Does anyone know of any good book/paper/article comparing the inflatory and deflatory economies? I would like to know if there are any scientific publications on the matter that are approachable to ...
4
votes
1answer
1k views

How many Namecoins are generated per block?

Is the block reward for Namecoin 50 like Bitcoin, or is there another figure?
5
votes
2answers
3k views

Does BTC-E have an API for alternate currencies?

BTC-E appears to have an API available at https://btc-e.com/api/1/ticker but this only lists the BTC/USD pair data. They also offer pairs of BTC against alternate currencies like Ixcoin and Tenebrix. ...
29
votes
5answers
14k views

How are public & private keys in an address created?

I understand the high level concept I am more interested specific details. How is a private key generated. How exactly is public key generated, how is address generated from public key.
6
votes
3answers
700 views

Is there an easy way to check out the market cap of the alternative currencies?

Ideally, I'd like to see a pie chart with the whole pie being "Bitcoin-derived crypto currencies", and each major alternative represented as a market cap in Bitcoins and USD. Currently, from what I ...
3
votes
1answer
665 views

What exchanges support Tenebrix?

Where can one exchange Tenebrix (a CPU-friendly cryptocurrency) for Bitcoin?
12
votes
3answers
2k views

What will happen when SHA 256 needs to be replaced?

MD5 used to be the hash algorithm. Everyone loved it, but now, not so much. What will happen to bitcoin if flaws are found in SHA256 in the future?
9
votes
3answers
2k views

How do I keep my miners from doing duplicate work?

Someone has n machines to mine for bitcoins. What's the simplest way to ensure that mining work isn't duplicated? (Will separate machines naturally work on different hashes even with the same ...
9
votes
1answer
665 views

Strange transaction (block 71036)

What happened to this transaction? Can someone explain it? http://blockexplorer.com/t/9eHTFRi3Qq
13
votes
6answers
7k views

How can I stop websites running an integrated Bitcoin miner without disabling javascript altogether?

"Bitcoin Plus" is one example of a javascript bitcoin mining client that can CPU mine bitcoins through a browser when viewing a website. Here is a screenshot from 4bitcoins dot com which automatically ...
6
votes
5answers
122 views

Will it be possible to export a key and only allow it to be imported once?

When the import/export key be implemented I would like to know if it will be possible to export a key with an option like: The exported file can only be imported one time, or that the exported key was ...
9
votes
1answer
385 views

How can I best implement Bitcoin in my business?

Is there any good tutorial, discussion or implementation of bitcoind for business? What's the best Bitcoin.conf? How to expose the Bitcoind API to the internet? How to guarantee confidentiality, ...
7
votes
2answers
597 views

Will fees be charged when importing a key to my wallet?

When the option to import/export keys is implemented, will fees be charged in this kind of transaction? My friend exports a key from their wallet with 2 BTC. My friend sends me this exported key by ...
9
votes
1answer
2k views

Push notification of incoming transaction

Is there a way to be notified by bitcoind via the CLI that some incoming transaction has been confirmed?

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