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Initial motivation for checkpoints in bitcoin is to prevent 51% attacks as explained by satoshi (July 17, 2010): The security safeguard makes it so even if someone does have more than 50% of the network's CPU power, they can't try to go back and redo the block chain before yesterday. (if you have this update) I'll probably put a checkpoint in ...


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Since I am not CfB, I cannot guarantee that my answer aligns 100% with his vision but this is my understanding of it: 1. Functionality of distributed coordinator in Cluster 0 Yes, exactly. The entities don't have to be companies, but it's very likely, that they will be. 2. Need of coordinator(s) in other clusters I don't know if Cluster 0 will need a ...


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