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What stops someone from tampering with node software and hence would be able to disrupt the blockchain?

Bitcoin Stack Exchange

Bitcoin News / Bitcoin Stack Exchange 161 Views

You are correct, when the new block is broadcasted, all the other nodes would reject it if it doesn't follow the consensus rules, would not add it to the blockchain nor will they transmit it.

In fact, the "software" itself is not important (there are multiple Bitcoin node clients), just like many software pieces can create JPEG photos (ranging from your phone, computer, camera, etc.), the protocol itself depends on what the nodes agree on.

You would be essentially creating a hard fork, and if for any reason all the nodes and miners use your "re-written software", and is accepted by everyone, then at that point that new Bitcoin probably becomes... Bitcoin.


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