5 ms·

You could in theory also get that with a lot of computation of course

• p1mrx 5y ago
  It should be straightforward to design a hash function that can't be preimage attacked using all the computing power in the universe. Maybe an omnipotent cryptographer would find flaws in SHA-256, but then they could design a better function and include it in the book.
  • kzrdude 5y ago
    Maybe their omnipotence includes being lucky enough
    • p1mrx 5y ago
      Why would an omnipotent being need luck? They have infinite brute force.