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1answer
63 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
78 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 ...
3
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2answers
68 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
votes
2answers
132 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.. ...
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2answers
330 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
votes
2answers
136 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 ...
1
vote
1answer
91 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 ...
2
votes
1answer
201 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
239 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 ...
11
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1answer
3k 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 ...
2
votes
3answers
263 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, ...
2
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0answers
1k 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 ...
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2answers
235 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 ...