First, I do not advocate anything here. I asked a question. Second, working with a large string of bits is the same as recursive hashing only if you can pre-co

First, I do not advocate anything here. I asked a question. Second, working with a large string of bits is the same as recursive hashing only if you can pre-compute some small intermediate state of the hash function for that string independently from the password you're trying to guess. If you can't, you would have to work with the entire string for every new password tried.