An analysis of the most prominent cryptocurrency and its flaws
What I originally wrote Bitcoin Cash and checkpoint was incorrect. Checkpoints do not increase security, and can be easily gamed.
If there is an N-block checkpoint, then an attacker can just reorg (N-1) blocks and then submit a final block to lock its reorg in place ... forever.
What I originally wrote Bitcoin Cash and checkpoint was incorrect. Checkpoints do not increase security, and can be easily gamed.
If there is an N-block checkpoint, then an attacker can just reorg (N-1) blocks and then submit a final block to lock its reorg in place ... forever.