He works in mysterious ways.

Merkle trees, also known as hash trees or binary hash trees, are tree-like data structures used in computer science. They are named after their inventor, Ralph Merkle, who proposed the concept in 1979 ...

BitTorrent version 1 used SHA-1 for hashing pieces, but SHA-1 could not detect tampering with the piece because Google confirmed a collision. BitTorrent version 2 is more secure by using SHA-256 for ...