this kind of stuff = merkle trees? they're really awesome. I like to think of the whole class of things as "self-authenticating data structures". for a list of

this kind of stuff = merkle trees? they're really awesome. I like to think of the whole class of things as "self-authenticating data structures". for a list of uses for merkle trees: https://en.wikipedia.org/wiki/Merkle_tree#Uses https://en.wikipedia.org/wiki/Merkle_tree#Uses