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Help me understand Instawallet better to trust it more!

I have read the FAQ. I like the idea it's only a link, I don't need it to be more complicated than necessary. For me it doesn't matter to store a generated difficult password for an account or only a ...
superuser's user avatar
  • 377
0 votes
1 answer
287 views

Instawire fees over Bitcoin Central fees and their respective KYC policies?

Instawire, Bitcoin-Central, Instawallet, Paytunia and Paymium are seem to be closely related, they cross reference each other on their sites, though their respective guarantees for their services are ...
superuser's user avatar
  • 377
3 votes
3 answers
1k views

Ideal passphrase length: old diceware method (5 words) vs. your Bitcoin wallet.dat passphrase length (8 words) and doubling passwords?

I made a cool 5 word passphrase back then using the old Diceware method and use it as a master password. The question is: as computing power increases, will we need to add more and more words to our ...
superuser's user avatar
  • 377
41 votes
5 answers
10k views

Why are hashes in the bitcoin protocol typically computed twice (double computed)?

According to the wiki specification of the bitcoin protocol, hashes are typically "computed twice". For example: hello 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824 (first round of ...
Stephen McCarthy's user avatar
2 votes
0 answers
106 views

Install a pre-synchronized blockchain [duplicate]

Possible Duplicate: Can I download the whole block chain from somewhere? My Bitcoin client has been "synchronizing" for a really ridiculously long time making the computer leggy. According to ...
Celeritas's user avatar
  • 879
7 votes
2 answers
543 views

How does one document Bitcoin investments for tax and other legal issues?

If Bitcoins are used as a store of value or investment vehicle, what legal documents should the investor require/keep? To date, no jurisdiction has special laws concerning cryptocurrencies, but ...
Jan's user avatar
  • 1,000
12 votes
1 answer
4k views

Current Bitcoin symbol: Who designed it, when and why?

I am looking for informations about the authors of the current symbol used for Bitcoin. I am also interested about any brand design explainations such as graphic guidelines, and the way this symbol ...
1213's user avatar
  • 233
4 votes
1 answer
366 views

Transaction shows up as sent, but was never recieved

I sent 0.002 BTC to 15bPd9YSB3kpuAFFz2tBZh39A3XdnN5UoX (I paid the transaction fee), but Bitcoin-Qt crashed when I pressed send. When I reopened it the transaction showed up, but it isn't in ...
lurf jurv's user avatar
  • 2,714
3 votes
2 answers
2k views

What research papers cover Bitcoin's impact on Central Banks, "velocity of money", and reserves?

I'm looking for research papers that cover the impact Bitcoin may have on Central Banking, interest rates, velocity of money, and their reserve. What research papers or information from thought ...
makerofthings7's user avatar
5 votes
1 answer
463 views

Does a Vanity Address reduce the randomness / entropy of the private key? Is there cryptographic proof?

Since a vanity address discards many "valid" keys in order to find one that matches a pre-determined string, I think that the "randomness" of the data would be reduced, thus weakening the key. Is ...
makerofthings7's user avatar
11 votes
2 answers
829 views

Anonymity through paying by bitcoin

I am considering the VPN service Privateinternetaccess. One of it's payment methods is bitcoins. As described on this page paying with bitcoins strengthens anonymity. In contradiction, this page ...
Celeritas's user avatar
  • 879
4 votes
0 answers
174 views

Mac bitcoin wallet stopped downloading the block chain [closed]

The wallet is stuck on 95.48% as it has been for the last few days. Before this the blockchain downloaded fairly rapidly, I have updated the version of the wallet and restarted but this has not fixed ...
user2568's user avatar
2 votes
1 answer
305 views

Why it's not good to the community to hoard bitcoins?

Colin Dean's answer to zcopley's question inspired me to ask this: While Bitcoin supporters would hope that one would not hold on to Bitcoin as an investment, but rather spend it in order to further ...
superuser's user avatar
  • 377
12 votes
2 answers
5k views

How to make Bitcoin-Qt client portable? (Windows)

It is a nice project and all, but I think in 2013 it shouldn't be a challenge to save all of an application's files into its own folder (maybe even by default), so you can use it without installing/...
superuser's user avatar
  • 377
4 votes
1 answer
283 views

What's the status of BitInstant's debit card?

http://www.engadget.com/2012/08/20/bitinstant-founder-says-bitcoin-debit-card-to-launch-within-next/ It's been almost four months. Where can I find the latest public information about this?
ripper234's user avatar
  • 26.6k
5 votes
2 answers
3k views

What's a better investment? Buying an ASIC-based mining rig, or buying bitcoin itself?

Seems like some miners are saying they would have made more money by simply buying and holding Bitcoin, rather than mining it. Is that likely to be the case going forward? I know I'm asking for ...
zcopley's user avatar
  • 167
-1 votes
2 answers
265 views

Wallet code number

I didn't write down my bitcoin wallet code (that long alphanumeric number that was assigned to me) when I installed the software. How do I find it?
user2560's user avatar
10 votes
1 answer
4k views

Do any actual bitcoin credit / debit cards exist yet?

With the rumors of the Bitinstant credit card failing to deliver, and the only other one out there being a fake scam site, does anyone out there offer a solution to this? Just the ability to pay with ...
Noi Sek's user avatar
  • 213
5 votes
1 answer
227 views

Who has admin privileges for the bitcoin wiki?

Who has an admin user? I know Stephen Gornick has. Who else? Who besides MagicTux has technical admin credentials? (server access)
ripper234's user avatar
  • 26.6k
2 votes
2 answers
1k views

OSX Vanitygen broken makefile [duplicate]

Whenever I try to install by running "make" it gives me tons of errors. $ make cc -ggdb -O3 -Wall -c -o pattern.o pattern.c pattern.c:32:18: error: pcre.h: No such file or directory pattern.c:1604: ...
lurf jurv's user avatar
  • 2,714
5 votes
1 answer
5k views

How does Bitcoin keep track of account balances?

I downloaded the latest bitcoin client and am waiting for it to connect. How does it remember how much money a person has? Do I create an account and the balance is associated with the account each ...
Celeritas's user avatar
  • 879
3 votes
1 answer
197 views

Is there a list of "hardforks that will never happen in Bitcoin"?

The Hardfork Wishlist lists some fork-causing changes that might actually get introduced (e.g. adding more decimal digits to allow units smaller than a satoshi). Is there a similar list of forks that ...
ripper234's user avatar
  • 26.6k
8 votes
1 answer
1k views

Can ASICS Merge-Mine?

Can ASICS in general, and specifically any of the models coming out soon merge-mine other cryptocurrencies?
Kinnard Hockenhull's user avatar
4 votes
1 answer
994 views

What is the "unit of account" in terms of Bitcoin?

Traditional economics depend on a "unit of account". Can anyone explain how a "unit of account" would be manifested in Bitcoin if so desired?
makerofthings7's user avatar
0 votes
1 answer
1k views

Linux poclbm error

I'm running on linux, just installed PyOpenCL, but when I run poclbm I get this error: 03/01/2013 16:49:12, Ignored invalid server entry: username:password@host:port Traceback (most recent call last)...
user2545's user avatar
14 votes
4 answers
6k views

Why are companies selling mining hardware instead of using it themselves?

I'm not (yet) using Bitcoin, and I'm just approaching this world as of now. I stumbled upon some merchants that sell mining hardware (with some GH/s). But I've yet to understand what they gain, apart ...
Helios's user avatar
  • 243
3 votes
1 answer
351 views

What Income Could I Expect as an OTC BitCoin Trader

How long is a piece of string? Given "typical" UK market conditions, if I wanted to trade BitCoins as an OTC trader (via LocalBitCoins, IRC etc) - what income could I expect? £10/day? £100/day? £1000/...
Avi's user avatar
  • 31
0 votes
1 answer
161 views

Various questions regarding wallet and mining

Ok so I downloaded the bitcoin program and started it up. And the program started downloading thousands of blocks. I haven't clicked anything or signed up anywhere, I have tried and i think succeeded ...
user2542's user avatar
5 votes
1 answer
2k views

How Does trading on the Exchanges Work?

Pardon my Ignorance but can somebody explain the basics Of how trading (Bid Buy/Bid Sell) works of the common exchanges www.mtgox.com www.btc-e.com Aslo some of the common ways people or ...
BitCoin New Guy's user avatar
1 vote
1 answer
3k views

What does it mean by Public Key on the Vanitygen Pool?

When I wanted to request a vanity address from https://vanitypool.appspot.com/ it asked me for my public key. I tried my main address, but it said it was too short. What should I put there?
lurf jurv's user avatar
  • 2,714
2 votes
1 answer
136 views

Can the outputs of a transaction change over time?

I would like to know if the outputs of any given transaction can change over time. For example, suppose I send a payment to three different addresses creating an unconfirmed transaction with several ...
flaab's user avatar
  • 854
4 votes
0 answers
73 views

When should I increment the sequence number vs creating a brand new Tx? [duplicate]

Possible Duplicate: What is TxIn’s sequence? What are the logical conditions that would require me to change a sequence number? Suppose there is this transaction txid: abcdefghi... sequence:...
makerofthings7's user avatar
3 votes
1 answer
255 views

How do I read a script? How does the processor separate "data" from "commands"?

I'm trying to understand how a script works but am having trouble reading a script (the output of one Tx... and the input of a second Tx) and figuring out how the computer (bitcoin-qt) knows which ...
makerofthings7's user avatar
3 votes
1 answer
432 views

How should a Bitcoin Oracle verify a transaction prior to signing?

What are the specific parts of a transaction(s) that need to be signed in the "inheritance scripting sample". Specifically, can someone provide more detail on what exactly is signed of the ...
makerofthings7's user avatar
25 votes
3 answers
10k views

Why does Bitcoin support both compressed and uncompressed keys/addresses?

My question is about the difference between compressed keys and addresses, and i know it was addressed in another question but my question is less about the theory and more about how the keys are used ...
leximus prime's user avatar
7 votes
3 answers
4k views

Can I send message inside the transactions script?

I would like to send transactions with messages as described in the wiki. In Transaction with slightly changed script is never relayed, someone answered that non-standard transactions are not relaid ...
Omar Alriyami's user avatar
3 votes
1 answer
401 views

Vanity Mining Error?

Well after getting a new graphics card (7770) I can mine bitcoins at around 120 - 180 Mhash/s Depending if I run it at full power or not. Now I thought I would try and mine myself an address using it ...
Ryan Walmsley's user avatar
3 votes
1 answer
338 views

Double spending from "green addresses" & mitigation

Suppose a user pays for a service (service1) using a "green address" (0 confirmations required) and service1 needs to immediately respend it using it's own green address How many blocks should the ...
makerofthings7's user avatar
45 votes
2 answers
72k views

How do I import a private key into Bitcoin-Core?

How do I import a private key into Bitcoin-Qt? bitcoind is nowhere to be found, and pywallet says it requires "bsddb" when I run it, which is also nowhere to be found. I generated some vanity ...
lurf jurv's user avatar
  • 2,714
3 votes
2 answers
871 views

blockchain.info JSON API problem

I'm trying to get the time series for a specific period from Blockchain but the JSON seems to not be there anymore. Does anyone know if the JSON API is not available anymore or it is a temporary issue?...
eu tot eu's user avatar
7 votes
2 answers
4k views

Why are fiat Currencies inflationary and Bitcoin deflationary?

Why are all fiat currencies inflationary, and lose value with time? Could governments make them deflationary? What are the advantages of inflationary currency compared with deflationary currency? ...
vi.su.'s user avatar
  • 1,852
6 votes
1 answer
309 views

How to configure a bitcoind instance solely designed to contribute to the network?

I'd like to run a headless bitcoind instance on a server, in order to contribute to the network. Are there any specific configuration options that are recommended for that purpose? My intention was ...
miracle2k's user avatar
  • 181
0 votes
1 answer
632 views

Check block reward

So this is an exercise for fun as we know the block reward already. But how would you get the bitcoind to show the block reward for the next block? There is no bitcoind getblockreward but is there a ...
Peter Bushnell's user avatar
3 votes
2 answers
652 views

Where do the majority of Bitcoin transactions take place?

I'm new to Bitcoin and am trying to wrap my head around where and when bitcoins are used. I understand that Bitcoin is accepted by a lot of legitimate websites (now reddit, wordpress, etc) for ...
Eric Conner's user avatar
3 votes
4 answers
6k views

How do i install bitcoind on my redhat linux server?

I have recently created an api that runs the bitcoind commands. I had it running on another server, but it was setup by someone else. I have been searching for sensible instructions on how to install ...
Andrew Font's user avatar
10 votes
1 answer
3k views

How is locktime enforced in the standard client?

I am trying to study the locktime feature of transactions ( https://en.bitcoin.it/wiki/Protocol_specification#tx ). I have created some raw transactions in the testnet with different locktimes, but, ...
halftimepad's user avatar
  • 1,408
-2 votes
1 answer
773 views

The bitcoin miner lags my cpu 99% and how i will earn bitcoins

Bitcoin Miner program uses my CPU 99% can you just little make it no laggy and how do i earn bitcoins? in the internet sites and forums they dont sya anything about earning bitcoins
Meriç Çelik's user avatar
5 votes
1 answer
459 views

What is the schema of the data stores used by the reference client?

I'm interested in seeing the schema (layout and indexes) that is used in the reference client. Namely wallet.dat, the bk** files and also the in-memory uncommitted tx. Does this exist anywhere for ...
makerofthings7's user avatar
5 votes
2 answers
14k views

Is CPU mining worthwhile for Litecoin? FPGA? GPU?

I'm interested in solo mining on Litecoin. Where can I learn about (or what math is required) two tell if this is feasible/profitable? Currently I have 30+ CPUs running as solo miners for 40 hours ...
makerofthings7's user avatar
6 votes
1 answer
786 views

Where can I learn more about BIP30; namely the exploit and the background discussion?

I'm having trouble understanding the bug that was fixed in BIP030, and how it would be exploited. Is the premise of this attack that there would have to be a netsplit and the chain was forked, then ...
makerofthings7's user avatar

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