Linked Questions
19 questions linked to/from Why is 6 the number of confirms that is considered secure?
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Revealing chain earlier when private attack
Private attack is to violate the safety of a block B by creating another chain of length equal to or longer than the longest chain containing B, after B has been confirmed.
As in my reference
If the ...
- 35
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Exchange Confirmation Requirements
What does the minimum confirmations required for a deposit mean for the security of exchanges? For example, Coinbase requires 3 confirmations for Bitcoin deposits. Suppose an adversary deposits 10 ...
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Cryptocurrency acceptance
I heard that the recommended waiting confirmation time for a bitcoin transaction is 6 blocks/ 1 hour. So a shop which lets its customer to pay in bitcoin without any waiting for confirmation would ...
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Understand double spending through an example
Let’s suppose you have 1 BTC which you try to spend twice.
You made the 1 BTC transaction to a merchant (Transaction T1). Now, you again sign and send the same 1 BTC on another Bitcoin address to try ...
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bitcoin reorg question
if a block takes 10 minutes to be mined
does it need 21 minutes to be reorged?
if the reorg started immediately after the block was mined
because 100% was mining and 51.5% will reorg
how long does ...
- 39
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2
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How long a high-priority transaction takes to evaluate
I am missing something so far in reading this (excellent resource). I read the part about transactions for the most part, but I don't understand the actual code evaluation part, and how long it takes. ...
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How could a lightweight wallet determine the validity of 0-conf transaction?
I found that a lot of people are interested about security of 0-confirmation payments. But, it seems that most discussions focused on double-spending (like broadcasting two or more conflicting-but-...
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Can two or more transactions sent from the same address be mined in the same block in Bitcoin's blockchain?
Imagine a person Bob has 10 bitcoins in his wallet. He wants to send 5 bitcoins to Alice and another 5 bitcoins to Uncle Tom simultaneously (in separate transactions). Will both Bob's transactions be ...
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What's so special about six blocks for confirming transactions?
I read that when your transaction is part of a block that has five other blocks on top of it, you can feel safe that your transaction is not in danger of being orphaned because someone else would come ...
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Can I spend a tx before it has 6 confirmations? [duplicate]
When I got a transaction (someone transfer some bitcoins to me), can I use it before the transaction has 6 confirmations?
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How many confirmations takes place before transaction is successful
Yesterday I attempted to send two bitcoin transfers from Livecoin and almost 24 hours later it hasn't been successful. When I check the transactions they have 99 and 95 confirmations. What does that ...
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Detection of double spend in Bitcoin for aged transactions
This is just to verify my understanding of Bitcoin double spend detection.
1) Use of UTXO indexes : This ensures that there as been no spend from that output (transferred to recipient in Block of ...
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How long should I wait to consider that the transation is "definitely" confirmed?
When one transaction is broadcasted, what is the probability that it won't be confirmed? (By probability, I mean the observed probability on the blockchain. If a person intentionally spend twice 1 ...
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What is the risk of waiting for just one confirmation to validate a transaction, assuming the counterparty is not a miner?
I am trying to determine how many confirmations would be reasonably safe to wait before accepting a Bitcoin transaction from an attacker that is not a miner and hence cannot rely on Finney attacks, ...
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Can someone explain how the Bitcoin Blockchain works?
I'm trying to figure out how the blockchain works and how to read it via blockchain.info website. Is there a laymen way of explaining how the block chain works and how to read the blockchain to trace ...
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