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boliu (OP)
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September 11, 2015, 01:27:12 PM
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Would a simple implementation of preventing any miner or pool to submit consecutive blocks solve these attacks?
                     
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September 11, 2015, 02:22:52 PM
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How would you determine that two submissions come from the same entity?  Assume they can: change the coinbase text (as they do), change the payout address (as they sometimes do), change their IP address (insofar that even matters), etc.

Additionally, your suggestion would not help against collusion (i.e. two miners working together).
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