EDIT: Deleted parent comment quoted the attackers-can't-list from [1]. You are quoting the wrong part. This only holds if the attacker does not try to build a

EDIT: Deleted parent comment quoted the attackers-can't-list from [1]. You are quoting the wrong part. This only holds if the attacker does not try to build a side-chain. It's much more difficult to change historical blocks, and it becomes exponentially more difficult the further back you go. As above, changing historical blocks only allows you to exclude and change the ordering of transactions. It's impossible to change blocks created before the last checkpoint. [1] https://en.bitcoin.it/wiki/Attacks#Attacker_has_a_lot_of_computing_power https://en.bitcoin.it/wiki/Attacks#Attacker_has_a_lot_of_com...