Auntie Merkle

https://medium.com/asecuritysite-when-bob-met-alice/how-to-completely-audit-our-financial-infrastructure-in-an-instance-meet-the-merkle-patricia-tree-8d72a659969e

from every single bank and in the whole of our financial infrastructure. And this would be for the whole history of our financial infrastructure. So at any point in time, we would see the complete picture over time and would see exactly when all the transactions were made and who was involved. If we wanted, we could anonymise the transaction data too.

15 mins fuel for thought.