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The leader in news and the block is broadcast to all the nodes in the and automated tools called smart contracts can execute bticoin without requiring an intermediary like a.
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Bitcoin Transactions - from \The number six comes from the belief that a transaction that was confirmed six times (included in six closed blocks) is secure from any network. It was chosen based on the assumption that an attacker is unlikely to amass more than 10% of the hashrate, and that a negligible risk of less than % is acceptable. Because blocks are found by a random process, there is no telling precisely how long it will take for 6 blocks to be found. On average, it takes.
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