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Each block is stacked on top of the previous one. Adding another block to the top makes all lower blocks more difficult to remove: there is more "weight" above each block. A transaction in a block 6 blocks deep (6 confirmations) will be very difficult to remove.
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GAMORA
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July 07, 2017, 04:44:29 PM |
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sarul
Copper Member
Sr. Member
Offline
Activity: 798
Merit: 250
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July 07, 2017, 05:16:47 PM |
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