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0answers
29 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?
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1answer
49 views

How does the receiver of a transaction check the whole chain of ownership?

While reading Satoshi Nakamoto's paper on how bitcoin works, I got stuck on #2. In a chain of transactions, how can someone who has received the coin check the whole chain with just a signed hash of ...
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2answers
46 views

Payee identity verification

When reading the Bitcoin paper by Satoshi, I noticed that he didn't mention any protocol by which the payer can verify the payee's identity, i.e. he is indeed paying the intended recipient. I would be ...
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0answers
26 views

Transaction verification process in full nodes

I'm having some trouble understanding the process of transaction verification on full nodes. I understand how a transaction is verified via public cryptography (hashes, signature, etc, as it's ...
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1answer
37 views

Transaction verification up to coinbase?

Do full nodes verify the entire transaction chain up to coinbase when verifiying a single transaction to be included on the block which they are working on ?
4
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1answer
118 views

What is “Verifying last 288 blocks at level 3”?

Upon every start of bitcoind, I see the following in de debug log: Verifying last 288 blocks at level 3 come up. At this point, no new blocks have been downloaded and the block chain was 100% up to ...
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1answer
84 views

Using blockchain to publish downloadable software verification codes

What is the point of comparing sha256 of downloaded file with published on the same website code? Why can't developers of currencies publish file version and sha256 hash on blockchain as alias or ...
4
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1answer
56 views

What is the point of comparing sha256 of downloaded file with published on the same website code? [closed]

Some websites publish sha256 to check authenticity of downloaded file. I suppose this is to protect against man-in-the-middle attack - that my file was not altered during download. What prevents ...
7
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2answers
372 views

Is it possible for someone to verify that a wallet is theirs wallet, without providing their private key?

I need to know with 100% certainty that someone can tell me "this is my wallet" and prove it to me. I could of course simply get their private key/brainwallet phrase, is there any other way to do it? ...
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0answers
14 views

How do transactions get vertified [duplicate]

I am wondering how do transactions get vertified. I understand that this requires hashing, but how the heck is hashing involved in this area. Thanks!
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0answers
19 views

Past verification requirements of Mt.Gox - data security after hacker attack [duplicate]

A hacker claims he has got all personal data of Mt.Gox customers. I guess the verification was done through their web form. Can someone remember what were the verification requirements? I guess they ...
2
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1answer
77 views

Verification of transaction once trasaction is broadcasted

I have few doubts regarding verification of transaction and am trying to find answers from last few days. I agree similar post exist in this portal but I am not getting satisfactory answer for my ...
1
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1answer
141 views

Who will verify any transaction when the upper bound to total number of bitcoins is reached? [duplicate]

I've read that there will be around 21 million BTCs. (How many bitcoins will there eventually be?) Also, to my beginner understanding, it seems that miners verify the active transactions. (What are ...
2
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3answers
123 views

Can each Bitcoin and Satoshi be uniquely identified?

I'm pretty sure I've read somewhere that BitCoins have an "address", so they can be uniquely identified. What I want to know is: Does each Satoshi have it's own unique identity? How is the identity ...
2
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1answer
143 views

Multi-Signature Transaction - Verify First Signature is Valid?

Using Gavin Anderson's TwoOfThree.sh Gist located here: https://gist.github.com/gavinandresen/3966071 Is it possible to verify the first "partial" signrawtransaction is valid from the known public ...
2
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1answer
1k views

Mtgox account verification pending, how to withdraw my bitcoins?

I had submitted my personal document for verification over 30 days; however, my account still pending for verification, what I can do to withdraw my bitcoin?
0
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1answer
117 views

How exactly does a block get constructed and verified?

From what I understand, a new block contains all the transactions within the last 10 minutes. So when Alice sends Bob 10 BTC, how does this information get put onto the newest block? I guess I am ...
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2answers
153 views

Is there a way to prove ownership of a transaction?

Is it possible to prove that you are the sender in a transaction? Prove this to 3rd-parties, not only the receiver.
4
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2answers
359 views

How do signatures work?

Just curious, if I send a transaction from one address to another, how do they verify it without knowing my private key?
3
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1answer
282 views

What exactly is checked at various -checklevel's?

The standard bitcoin-qt/bitcoind client has an option -checklevel which purports to perform various checks on the block data stored on disk. Is there current documentation (other than the source) ...
4
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1answer
130 views

Do all block have to be verified every time a new block is broadcasted?

I did a presentation for my office and during the presentation I was asked a question that I was not prepared for. It's a more technical question from my perspective, but someone here might already ...
4
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1answer
180 views

What is the block verification procedure, and will it ever become too expensive?

I'm trying to get a grasp on which items the network is responsible for validating / enforcing. If I understand correctly, when a new block is received, the recipient needs to verify the following: ...
2
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1answer
11k views

GUI Miner no responses to getwork, and Verification failed

I just starting with mining today I have everything set up for slush pool on GUIMiner - v2012-12-03 . I'm not sure what is wrong but this is what the console says 2013-06-21 01:37:26: Listener for ...
3
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1answer
236 views

How does a client get the merkle branch of a transaction?

When the Bitcoin client receives a transaction, it checks if the transaction is confirmed. This is done by verifying that the transaction hashes correctly, in the merkle tree, to the merkle root in a ...
0
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1answer
841 views

Solving a block and verification of transactions [duplicate]

My understanding of mining is that the reason an award of Bitcoin comes along with the solving of the current block is to give people incentive to actually try to solve the block. My understanding is ...
6
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2answers
271 views

What alternatives are there to hardcoding checkpoints into the Bitcoin client?

Checkpoints seem like a crucial part of the security & validation apparatus in BitCoin. Is there a written policy in place, among the developers defining the maximum interval between checkpoints? ...
3
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2answers
201 views

Is it possible for a valid block to be added to an invalid one, and have it accepted by another client?

This wiki page says invalid blocks aren't counted towards determining chain length and that make me want understand how invalid blocks are treated. Can an valid block be added to an invalid one.. ...
5
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3answers
718 views

Would it be possible to provide a downloadable blockchain that is updated and verified by a mass of people?

As of November 2012, the blockchain is nearly 3 GB in size with a near-linear growth of about 500 MB/month (cut from exponential growth by the hard-coded block size limit, I guess). I want to install ...
3
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2answers
482 views

How do I “Verify my wallet” [closed]

I'm completely new to the BitCoin world and I've purchased a couple of coins through eBay. The seller has messaged me saying this: "Donation sent to 1Nf9iW******Yx4cPKB ...Please verify wallet and ...
2
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1answer
148 views

How was the overflow bug of 2010 detected? Should UINT64_MAX value transactions be considered suspicious?

The overflow bug of 2010 was a result of a client that summed two values together and reaching INT64_MAX instead of UINT64_MAX. Should transactions of INT64_MAX (or any similar constant) be treated ...
4
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1answer
415 views

Does 'simplified payment verification' work?

I was reading the original bitcoin paper where they mention a simplified payment verification scheme in section 8. I was wondering whether or not this actually works. A quick sketch: The scheme ...
2
votes
1answer
608 views

Miner username and password - does it need to be unique in the major pools?

Every Bitcoin mining pool relies on Basic Access Authentication to identify the user and credit their account for the work performed. But does this identification in form of username and password have ...
12
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2answers
5k views

MtGox - trusted vs verified

What is the difference between a "trusted", "verified" and other accounts at MtGox? In order to get "verified", one needs to provide them with photo ID and utility bill, but how does one get ...
3
votes
3answers
440 views

Tracking transactions as a Receiver

I have a question concerning the transaction of bitcoins. If, for example, I send some BTC to a specific address, does the receiver have any chance in verifying that I have already sent the BTC, ...
3
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0answers
2k views

Why MtGox does not accept a bank statement as proof of address for verification? [closed]

To increase the transaction limits on a MtGox account you need to submit a personal ID (passport or drivers license) and a utility bill (electricity/water/gas/phone) as a proof of address. It is ...
7
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2answers
388 views

How should one try verifying to whom a given Bitcoin address belongs?

Lets say, I'd have a website that shows a large number of Bitcoin public addresses, and wanted to give option for anyone that owns a given address to verify it automatically. Assuming that one ...