If your data is so important that it needs to be protected from future theoretical attacks.... what the heck are you doing uploading it to a globally distributed and decentralized platform?!

Said another way: you are trying to fit a centralized-shaped peg into a decentralized-shaped hole... wrong tool for the job.

If your use case does involve this situation somehow (?) then the only real solution is to encrypt it, as others in this thread have pointed out. There is simply no other option in an open-membership P2P network... otherwise the RIAA and MPAA would have long ago crushed BitTorrent.