Many decades ago, a bank was hacked for very large sums of money via wire transfers. The vice presidents who had the authority to make such transfers had elaborate methods of bonded couriers carrying the daily authorization codes to each VP, secure methods of holding those codes for the VP to access and elaborate methods of verifying the identity of the VP when they called in the transfer to the bank's operation center.
Then the operators at the operation center wrote the daily authorization code on a giant whiteboard in view of a glass window to the hallway.
