1. 5

  2. 2

    As another fun fact, both Sha2 algorithms have 8 registers of state, plus a spare or two for the input data and length, making them difficult to implement quickly with fewer than 10 regs or so.

    1. 1

      IIRC, ZFS supports SHA-512 for speed and then turns it into a SHA-256 representation to fit into the file system format.