Well, it would depend on the entropy of the folder. Maybe we know the general structure of the folder, except some crucial short piece of information. Otherwise

Well, it would depend on the entropy of the folder. Maybe we know the general structure of the folder, except some crucial short piece of information. Otherwise, everyone would also be fine using SHA-1 to store passwords. N.B: I don't know anything about the protocol, or whether the above applies. But appealing to the strength of a hash function only makes sense for hard-to-guess hashing material, which is not always the case.