Sure but that method just trades time for space. Later work did reduce the overall complexity by substituting different "hard problems" as the cryptographic primitive, but it's still in the realm of unusable scaling characteristics.
On the other hand, so far as I know, no one has published any papers that suggest a fundamental barrier to improvement. Here's hoping!
On the other hand, so far as I know, no one has published any papers that suggest a fundamental barrier to improvement. Here's hoping!