That's what key derivation functions, and hashing algorithms like bcrypt do, they have a #rounds, or a cost factor which adds a non-trivial amount of computatio

That's what key derivation functions, and hashing algorithms like bcrypt do, they have a #rounds, or a cost factor which adds a non-trivial amount of computation time. Fast enough that it doesn't impact "human time" but slow enough that "computer time" is impacted.