PBKDF2 directly might be some sort of multiverse locked box? Store a "safe key" in a box, in a box, in a box, in a box, in a box... in an iteration of boxes.
Every key in the universe is able open the first box, and every other box. But each key opens up a different multiverse of boxes. The problem for the attacker is they have to open every box, in a box, in a box... in succession to get to a "safe key" stored in that multiverse, which looks like a safe key and quacks like a safe key, but might not be the right safe key.
Maybe not quite right, as the "safe key" is really just another box in the end, but that doesn't make much sense... unlike a box of multiverse of boxes =)
PBKDF2 directly might be some sort of multiverse locked box? Store a "safe key" in a box, in a box, in a box, in a box, in a box... in an iteration of boxes.
Every key in the universe is able open the first box, and every other box. But each key opens up a different multiverse of boxes. The problem for the attacker is they have to open every box, in a box, in a box... in succession to get to a "safe key" stored in that multiverse, which looks like a safe key and quacks like a safe key, but might not be the right safe key.
Maybe not quite right, as the "safe key" is really just another box in the end, but that doesn't make much sense... unlike a box of multiverse of boxes =)