Merkle. They were invented by Ralph Merkle, not the chancellor of Germany. This would be a Merkel tree: http://c8.alamy.com/comp/D5AYH7/german-chancellor-angel

Merkle. They were invented by Ralph Merkle, not the chancellor of Germany. This would be a Merkel tree: http://c8.alamy.com/comp/D5AYH7/german-chancellor-angela-merkel-waters-a-tree-inastana-kazakhstan-D5AYH7.jpg http://c8.alamy.com/comp/D5AYH7/german-chancellor-angela-mer...